5 things for February 16: Florida massacre, immigration, Rick Gates, S. Africa, flu

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Morning news briefing from CNN

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(CNN)The victims and families affected by the Florida high school shooting have great needs right now. Here's how you can help them. And here's what else you need to know to Get Up to Speed and Out the Door. (You can also get "5 Things You Need to Know Today" delivered to your inbox daily. Sign up here.)

1. Florida high school shooting

As the gunshots rang out on that awful afternoon, heroes stepped up at Marjory Stoneman Douglas High School. Like the football coach who died after he threw himself in front of students to shield them from the hail of bullets. Or the teacher killed as he tried to get students back into his classroom. Or the ROTC students who used Kevlar sheets to help protect their classmates. It's those stories that people most want to talk about as the entire nation tries to come to grips with this latest school shooting, which left 17 people dead. (You can read more about the victims here.)
We've also learned a bit more about the frantic police search for the person police say is behind all this carnage -- and how some students texted messages of love and fear as a shooter stalked their campus. Nikolas Cruz, a former student at the school, confessed to being the gunman, according to a probable cause affidavit. He was charged with 17 counts of premeditated murder. He'd put a lot of menacing posts on social media -- including one he may have signed with his own name -- so we're all now wondering why signs that he might be capable of such violence were missed.
    Officer describes moment he arrested shooter
    Officer describes moment he arrested shooter

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      Officer describes moment he arrested shooter

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    Officer describes moment he arrested shooter 01:16
    President Trump addressed the nation, stressing the need to address mental health issues in America and urging children to seek help if they feel lost or alone. But lots of people -- including children and desperate, grieving parents and even late-night stars -- want Washington to do something -- anything -- about guns (a word Trump didn't mention in his speech).
    Victim's mom begs Trump: Do something!
    Victim's mom begs Trump: Do something!

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      Victim's mom begs Trump: Do something!

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    Victim's mom begs Trump: Do something! 02:41

    2. Immigration

    Looks like it's back to the drawing board for an immigration deal. Two plans went down in the Senate. One was a much-ballyhooed bipartisan plan that would have offered a pathway to citizenship for 2 million undocumented immigrants who came to the US as children, plus provided $25 billion for border security. It failed to get the 60 votes it needed after the White House trashed it (much to the chagrin of several senators). But then, the White House couldn't push through its own preferred plan, which would have substantially increased federal deportation powers. So, what's next? No one seems to know, but the deadline to do something to help Dreamers is less than three weeks away.
    Dreamer twins may be deployed or deported
    Dreamer twins may be deployed or deported

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      Dreamer twins may be deployed or deported

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    Dreamer twins may be deployed or deported 03:47

    3. Russia investigation

    Former Trump campaign adviser Rick Gates is finalizing a plea deal with special counsel Robert Mueller's office, indicating he's poised to cooperate in the investigation, according to sources familiar with the case. Gates has already spoken to Mueller's team about his case and has been in plea negotiations for about a month.
    He's had what criminal lawyers call a "Queen for a Day" interview, in which a defendant answers any questions from the prosecutors' team, including about his own case and other potential criminal activity he witnessed. Gates' cooperation could be another building block for Mueller in a possible case against President Donald Trump or key members of his team.
    Sources: Rick Gates close to plea deal
    Sources: Rick Gates close to plea deal

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      Sources: Rick Gates close to plea deal

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    Sources: Rick Gates close to plea deal 01:52

    4. South Africa

    Say hello to Cyril Ramaphosa, South Africa's new President. He was confirmed just hours after former President Jacob Zuma stepped down. Ramaphosa pledged to be a "servant of our people." He's spoken out against corruption, noteworthy because it was years of corruption-related scandals that drove Zuma from office. Ramaphosa was a trade union leader during the days of apartheid and was the chief negotiator for Nelson Mandela, who thought so much of Ramaphosa that he wanted him to succeed him when his historic presidency ended.
    Ramaphosa elected as South Africa's President
    Ramaphosa elected as South Africa's President

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      Ramaphosa elected as South Africa's President

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    Ramaphosa elected as South Africa's President 01:22

    5. Flu vaccine

    Got the flu shot but still got sick? You're not alone. The CDC says this year's flu vaccine has only been about 36% effective. But it's still a good idea to get the shot, the agency says, because if you do get sick, it's likely to be less severe and not last as long. This has been a particularly difficult flu season, especially for children. Sixty-three children in the US have died from the flu; three-quarters of them had not been vaccinated.
    4 ways the flu turns deadly
    4 ways the flu turns deadly

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      4 ways the flu turns deadly

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    4 ways the flu turns deadly 01:39

    WINTER OLYMPICS

    MEDAL MISS: Mikaela Shiffrin missed out on adding to her medal haul when she finished fourth in the slalom.
    Mikaela Shiffrin: I'm chasing the world
    Mikaela Shiffrin: I'm chasing the world

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      Mikaela Shiffrin: I'm chasing the world

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    Mikaela Shiffrin: I'm chasing the world 01:23
    SUPER SKATER: South Korea's Yun Sung-bin clinched his nation's second gold medal of these Games with his triumph in men's skeleton.
    FIGURE SKATING: American figure skater Nathan Chen had a disappointing outing in the men's short program, while defending Olympic champion Yuzuru Hanyu of Japan wowed the crowd with his performance.
    Nathan Chen describes the feeling of landing a quad
    Nathan Chen describes the feeling of landing a quad

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      Nathan Chen describes the feeling of landing a quad

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    Nathan Chen describes the feeling of landing a quad 01:10

    BREAKFAST BROWSE

    People are talking about these. Read up. Join in.
    I dos and I don'ts
    Amy Schumer married her chef boyfriend, so congrats to her, but Jennifer Aniston separated from her husband after just a couple of years together.
    Thanks a lot, young'un
    Ready to feel really old? Watch this 17-year-old Olympic gold medalist fail to recognize any of these classic '90s tunes.
    Meal makeover
    McDonald's is yanking cheeseburgers out of Happy Meals to make them healthier -- but leaving in Chicken McNuggets? How does that help?
    McDonald's to reduce calories in Happy Meals
    McDonald's to reduce calories in Happy Meals

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      McDonald's to reduce calories in Happy Meals

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    McDonald's to reduce calories in Happy Meals 01:01
    Catch some air
    What will passenger plane travel be like in 2068? We could be flying all electric, and there may not be a pilot.

    WHAT'S FOR LUNCH

    Finally ... 'Black Panther'!!
    The much-anticipated superhero film opens today in theaters across the country.
    'Black Panther' to make a huge cultural impact
    'Black Panther' to make a huge cultural impact

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      'Black Panther' to make a huge cultural impact

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    'Black Panther' to make a huge cultural impact 02:04

    AND FINALLY ...

    Picture perfect
    It's been a minute since we've heard anything from "Postmodern Jukebox." Here, they do a "prom cover" of Ed Sheeran and Beyonce's "Perfect Duet." (Click to view.)