All In Agenda: The mystery of flight 370

1. How does a plane drop out of the sky and vanish without a trace? Chris Hayes explores the mystery of Malaysian Airlines Flight 370 with Greg Feith, former NTSB investigator. 

2. It's the eve of a high-stakes race in Florida: Obamacare is on the ballot as Democrat Alex Sink goes head-to-head with Republican David Jolly in the race to fill 22-term Congressman Bill Young's seat. Jess McIntosh, Communications Director for the political action committee Emily's List, joins us. 

3. What happens when New York City's new mayor Bill de Blasio gets on Liam Neeson's bad side? That's the story we have for you tonight. 

4. Plus: Charter schools. Are they the best way to educate our kids, or a drain on public school resources? As the debate heats up in New York City, we'll talk with Mike Grynbaum, New York Times City Hall Bureau Chief, New York City public school teacher Brian Jones, a co-producer of "The Inconvenient Truth Behind Waiting for Superman," and James Merriman, CEO of the New York City Charter School Center.