Protesters in Atlanta block a highway following the recent police shootings
WGCL
Protesters in Atlanta block a highway following the recent police shootings
Now playing
00:47
Protesters shut down highway
black voices in dallas orig cm_00001904.jpg
black voices in dallas orig cm_00001904.jpg
Now playing
01:23
What black men in Dallas need you to know
Slain Dallas Officers
CNN
Slain Dallas Officers
Now playing
01:20
Obama speaks at Dallas service for slain officers
Police Chief at service
CNN
Police Chief at service
Now playing
03:28
Dallas police chief recites Stevie Wonder at service
dallas police officers memorial mayor michael rawlings sot _00000000.jpg
dallas police officers memorial mayor michael rawlings sot _00000000.jpg
Now playing
00:53
Dallas mayor: Officers died trying to stop the violence
Now playing
03:04
President Obama: We all know racial bias exists
Dallas trauma surgeon Brian Williams talks to Don Lemon about the Dallas shootings
CNN
Dallas trauma surgeon Brian Williams talks to Don Lemon about the Dallas shootings
Now playing
01:35
Dallas trauma surgeon: This has to stop
trauma surgeon brian williams part 1 intv lemon ctn_00004418.jpg
trauma surgeon brian williams part 1 intv lemon ctn_00004418.jpg
Now playing
04:41
Surgeon describes treating Dallas officer (Part 1)
trauma surgeon brian williams part 2 intv lemon ctn_00052602.jpg
trauma surgeon brian williams part 2 intv lemon ctn_00052602.jpg
Now playing
08:47
Surgeon describes treating Dallas officer (Part 2)
dallas shooting victim shetamia taylor officer yelled sot ac360_00021129.jpg
dallas shooting victim shetamia taylor officer yelled sot ac360_00021129.jpg
Now playing
02:28
Dallas survivor: Officer yelled, 'He's got a gun!'
CNN's Sara Sidner shows you what a pound of C-4 on a robot arm does in light of the Dallas Police tactic against a sniper.
WCVB
CNN's Sara Sidner shows you what a pound of C-4 on a robot arm does in light of the Dallas Police tactic against a sniper.
Now playing
02:36
How Dallas police used a robot bomb to stop shooter
one Dallas protesters come together nccorig_00000506.jpg
Yon Pomrenze/CNN
one Dallas protesters come together nccorig_00000506.jpg
Now playing
01:20
Opposing protesters meet in Dallas
dallas shooter parents speak micah johnson blaze ath_00003124.jpg
The Blaze
dallas shooter parents speak micah johnson blaze ath_00003124.jpg
Now playing
02:51
Dallas shooter's parents speak out for first time
dallas police chief david brown shooter was singing sot sotu_00002401.jpg
CNN
dallas police chief david brown shooter was singing sot sotu_00002401.jpg
Now playing
01:00
Police: Dallas shooter was singing during standoff
dallas shooting victim shetamia taylor officer yelled sot ac360_00021725.jpg
dallas shooting victim shetamia taylor officer yelled sot ac360_00021725.jpg
Now playing
09:49
Shooting survivor, family talk about attack
dallas police chief david brown protesters sot_00003706.jpg
CNN
dallas police chief david brown protesters sot_00003706.jpg
Now playing
01:03
Police: We'll give our lives for your right to protest
DALLAS, TX - July 8, 2016: Dallas Mayor Mike Rawlings (R) looks on during a press conference at Dallas City Hall as Dallas Police Chief David Brown speaks on the fatal shootings of five police officers on July 8, 2016 in Dallas, Texas. At least one sniper killed five officers and wounded seven others in a coordinated ambush at a anti-police brutality demonstration in Dallas. The sniper was killed, and three other people are in custody, officials said. (Photo by Stewart F. House/Getty Images)
Stewart F. House/Getty Images North America/Getty Images
DALLAS, TX - July 8, 2016: Dallas Mayor Mike Rawlings (R) looks on during a press conference at Dallas City Hall as Dallas Police Chief David Brown speaks on the fatal shootings of five police officers on July 8, 2016 in Dallas, Texas. At least one sniper killed five officers and wounded seven others in a coordinated ambush at a anti-police brutality demonstration in Dallas. The sniper was killed, and three other people are in custody, officials said. (Photo by Stewart F. House/Getty Images)
Now playing
01:00
Dallas police chief praises officers during shootings
shootings protests in arizona police clash pepper spray_00001214.jpg
shootings protests in arizona police clash pepper spray_00001214.jpg
Now playing
00:49
Protesters and police clash in Arizona
Now playing
02:02
Van Jones: Cops, blacks both feel targeted
LAURA BUCKMAN/AFP/Getty Images, From Facebook
Now playing
02:37
Dallas protest shattered by ambush shooting
Dallas Mayor Mike Rawlings says they believe Dallas police shooter Micah Xavier Johnson acted alone
KDAF
Dallas Mayor Mike Rawlings says they believe Dallas police shooter Micah Xavier Johnson acted alone
Now playing
01:06
Dallas mayor confirms gunman was the lone shooter
Bystanders stand near pollice baracades following the shootings.
LAURA BUCKMAN/AFP/Getty Images
Bystanders stand near pollice baracades following the shootings.
Now playing
01:09
See video of the Dallas shooting
TOPSHOT - Bystanders stand near pollice baracades following the sniper shooting in Dallas on July 7, 2016. A fourth police officer was killed and two suspected snipers were in custody after a protest late Thursday against police brutality in Dallas, authorities said. One suspect had turned himself in and another who was in a shootout with SWAT officers was also in custody, the Dallas Police Department tweeted. / AFP / Laura Buckman (Photo credit should read LAURA BUCKMAN/AFP/Getty Images)
LAURA BUCKMAN/AFP/AFP/Getty Images
TOPSHOT - Bystanders stand near pollice baracades following the sniper shooting in Dallas on July 7, 2016. A fourth police officer was killed and two suspected snipers were in custody after a protest late Thursday against police brutality in Dallas, authorities said. One suspect had turned himself in and another who was in a shootout with SWAT officers was also in custody, the Dallas Police Department tweeted. / AFP / Laura Buckman (Photo credit should read LAURA BUCKMAN/AFP/Getty Images)
Now playing
02:16
Chaos in Dallas as 12 officers are shot
Law enforcement officials wait outside the emergency room entrance at Baylor University Medical Center.
Tony Gutierrez/AP
Law enforcement officials wait outside the emergency room entrance at Baylor University Medical Center.
Now playing
02:26
Police: Suspect said he wanted to kill white officers
A Dallas police officer, who did not want to be identified, takes a moment as she guards an intersection in the early morning after a shooting in downtown Dallas, Friday, July 8, 2016. At least two snipers opened fire on police officers during protests in Dallas on Thursday night; some of the officers were killed, police said.
LM Otero/AP
A Dallas police officer, who did not want to be identified, takes a moment as she guards an intersection in the early morning after a shooting in downtown Dallas, Friday, July 8, 2016. At least two snipers opened fire on police officers during protests in Dallas on Thursday night; some of the officers were killed, police said.
Now playing
00:47
Desperate calls from Dallas officers during ambush
Now playing
01:23
Video from balcony shows Dallas shooting
People rally in Dallas, Texas, on Thursday, July 7, 2016 to protest the deaths of Alton Sterling and Philando Castile. Black motorist Philando Castile, 32, a school cafeteria worker, was shot at close range by a Minnesota cop and seen bleeding to death in a graphic video shot by his girlfriend that went viral Thursday, the second fatal police shooting to rock America in as many days. / AFP / Laura Buckman (Photo credit should read LAURA BUCKMAN/AFP/Getty Images)
LAURA BUCKMAN/AFP/Getty Images
People rally in Dallas, Texas, on Thursday, July 7, 2016 to protest the deaths of Alton Sterling and Philando Castile. Black motorist Philando Castile, 32, a school cafeteria worker, was shot at close range by a Minnesota cop and seen bleeding to death in a graphic video shot by his girlfriend that went viral Thursday, the second fatal police shooting to rock America in as many days. / AFP / Laura Buckman (Photo credit should read LAURA BUCKMAN/AFP/Getty Images)
Now playing
01:13
'It looked like an execution'
dallas police officer shooting ground vo_00003228.jpg
Michael Kevin Bautista/Facebook
dallas police officer shooting ground vo_00003228.jpg
Now playing
02:38
See video of Dallas shooting
president obama reacts to dallas shootings from warsaw poland_00000000.jpg
president obama reacts to dallas shootings from warsaw poland_00000000.jpg
Now playing
02:32
President Obama reacts to Dallas shootings from Warsaw
dallas police shooting chief david brown negotiating with suspect sot_00001104.jpg
KTVT
dallas police shooting chief david brown negotiating with suspect sot_00001104.jpg
Now playing
00:59
Police: Suspect said he's going to kill more
dallas police officers shot gunshots heard sot ctn_00000022.jpg
Twitter/allisongriz
dallas police officers shot gunshots heard sot ctn_00000022.jpg
Now playing
01:17
Gunshots ring out in Dallas, officers killed
People rally in Dallas, Texas, on Thursday, July 7, 2016 to protest the deaths of Alton Sterling and Philando Castile. Black motorist Philando Castile, 32, a school cafeteria worker, was shot at close range by a Minnesota cop and seen bleeding to death in a graphic video shot by his girlfriend that went viral Thursday, the second fatal police shooting to rock America in as many days. / AFP / Laura Buckman (Photo credit should read LAURA BUCKMAN/AFP/Getty Images)
LAURA BUCKMAN/AFP/AFP/Getty Images
People rally in Dallas, Texas, on Thursday, July 7, 2016 to protest the deaths of Alton Sterling and Philando Castile. Black motorist Philando Castile, 32, a school cafeteria worker, was shot at close range by a Minnesota cop and seen bleeding to death in a graphic video shot by his girlfriend that went viral Thursday, the second fatal police shooting to rock America in as many days. / AFP / Laura Buckman (Photo credit should read LAURA BUCKMAN/AFP/Getty Images)
Now playing
01:03
Dallas shooting witness: People were trampled
Now playing
01:10
Witness describes Dallas police officer getting shot
police officers shot dallas texas witness sot ctn_00010002.jpg
KTVT
police officers shot dallas texas witness sot ctn_00010002.jpg
Now playing
02:28
Dallas shooting witness: I heard about 20 gunshots
tx shooter witness_00000000.jpg
tx shooter witness_00000000.jpg
Now playing
00:56
Dallas Witness: 'Complete pandemonium' after shooting
KTVT
Now playing
01:32