Bobby Allyn joins us with the latest on the NTSB investigation into the fatal derailment of Amtrak train 89 in Chester. Laura Benshoff joins us from Villanova University, where students are gearing up for tonight’s NCAA championship game against UNC. Kevin McCorry reports the FCC is expanding a program to provide wireless internet to low income students. Marielle Segarra reports on the origins of investigation into lead poisoning. And Franklin Institute Chief Astronomer Derrick Pitts joins us to discuss Robert Bigelow’s program engineering dwellings for if and when people colonize Mars.