Obama leads country through grief

President Barack Obama and first lady Michelle Obama arrive for a memorial service in Fort Hood, Texas, on Wednesday, April 9. Officials say Army Spc. Ivan Lopez took a .45-caliber handgun onto the military post last week, killing three people and injuring 16 before taking his own life.

President Barack Obama and first lady Michelle Obama arrive for a memorial service in Fort Hood, Texas, on Wednesday, April 9. Officials say Army Spc. Ivan Lopez took a .45-caliber handgun onto the military post last week, killing three people and injuring 16 before taking his own life.