Brian Ries, social media editor for Newsweek/Daily Beast, on how students used Twitter during the Chardon school shooting.
John Avlon, Matt Keelen and Majorie Clifton on the Michigan and Arizona primary results and what it means for 2012 race.
Ashleigh Banfield and Zoraida Sambolin on the "Stache Act," calling for a $250 tax break for men or women with mustaches.
The search is on right now for three people after a Coast Guard chopper went down in Alabama. The Coast Guard says one crew member who was rescued has now died.
Rescuers are searching the waters of Mobile Bay, off Point Clear in Alabama, where the MH-65 Dolphin chopper went down. It was on a training mission when it crashed.
This morning, Coast Guard Capt. Don Rose on the latest in a search for 3 crew members missing after a chopper crash in Alabama.
Craig Scott, Columbine shooting survivor and founder of "Rachel's Challenge," on similarities to the Chardon school shooting.
Jessie Klein, author of the upcoming book "The Bully Society," on how children are increasingly bullied and isolated.
Virginia Tech survivor Colin Goddard, now with the Brady Campaign to Prevent Gun Violence, on Chardon school shooting.
Kiki McLean, Trey Hardin and Goldie Taylor explain who has the most to gain and lose in today's primary contests.
We're getting an early read on your local news that's making national headlines: This morning we have papers from New York and Los Angeles.
NY TIMES: U.S. Scientists uncover a potential breakthrough in battling infertility.
Scientists are now using stem cells to generate human eggs. Though their work is still in the early stages, biologists are isolating stem cells from which new eggs can be created.
LOS ANGELES TIMES: 22 Carnival Splendor cruise ship passengers robbed in Mexico
Gunmen stole the passengers' valuables, including cameras and money. They were tourists ambushed near Puerto Vallarta riding on a bus back from a nature hike in the Mexican jungle.
Carnival, the company that ran the cruse, is apologizing.
US Weekly's Bradley Jacobs and Zoraida Sambolin recap their predictions for big winners at the 2012 Academy Awards.