Updated at 6:46 p.m. EDT

The Democratic National Committee filed an attention-grabbing lawsuit against the Russian government, WikiLeaks and Donald Trump's presidential campaign that says they conspired to interfere with the 2016 U.S. presidential election.

The suit — which faces legal obstacles because of the Justice Department's investigation into Russia's attack and the difficulties involved with suing a foreign government — develops a theory about alleged collusion between Trump's campaign and the Russians.

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At schools across the country today, students are getting up from their desks and walking out when the clock strikes 10 a.m. They're participating in the National School Walkout, part of the movement that has taken hold among students to call for action to end gun violence.

Today marks 19 years since the shooting at Columbine High School in Littleton, Colo., in which two high school students shot and killed thirteen people.

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