What to know now:

1. It's a super day: Tuesday will see 12 states hold primary elections as the largest voting day in the 2016 election cycle has arrived. By the end of Super Tuesday, Republicans will award about half of the 1,237 delegates needed to claim the GOP  nomination. For Democrats, Hillary Clinton and Sen. Bernie Sanders will be battling over more than 800 delegates. Click here to see an explainer on Super Tuesday.

2. Photographer slammed: A photographer for Time was grabbed by the neck and slammed to the ground by a Secret Service agent at a rally for Donald Trump in Virginia Monday. Chris Morris was thrown down by an agent after he stepped out of a press "pen" to take a photo of protestors at Trump's rally. The incident happened after a verbal altercation. Time said in a statement they had contacted the Secret Service, and that Morris felt sorry for his part in the incident.

3. Last of the emails: On Monday, the State Department released 1,700 of Hillary Clinton's emails – the last of the 52,000 pages of emails off of a private server she kept in her New York home while she was secretary of state. The release Monday brought the total of emails deemed to have contained classified material to 2,080.

4. He's headed home: Astronaut Scott Kelly is scheduled to return to Earth on Tuesday after spending 340 days in space – a record for a U.S. astronaut. He and two Russian cosmonauts will land in Kazakhstan.

5. Andrews testifies: Sportscaster and "Dancing with the Stars" host Erin Andrews testified about how her life was in shambles after a man secretly shot nude photos of her in a Tennessee hotel room then posted them on the internet. Andrews broke down in tears talking about the moment she first saw the photos online. "I grabbed my laptop and flipped it open and like you know your body, and I saw it for two seconds and was like 'oh my god,'" she said. She is suing the man who shot the video and the owner and operator of the Marriott at Vanderbilt for $75 million.

And one more

Actor George Kennedy, who starred in such movies as "The Eiger Sanction, "Airport 1975," and the "Naked Gun" series, died Sunday in Idaho. Kennedy, who won an Oscar for his role in "Cool Hand Luke," was 91.

In case you missed it

Here’s something to do while waiting for votes to be counted.