Congress: Pelosi's gamble

The Hill: "Speaker Nancy Pelosi (D-Calif.)

is moving forward with a floor vote on climate change legislation this week even though many Democrats are undecided on the controversial bill. Pelosi's gamble to schedule a Friday vote is one of the riskiest moves she has made as Speaker. There are at least eight Democrats who are firm 'no' votes, while many others are on the fence." 

Video: Officials in Washington, D.C., still don't know what caused two commuter trains to collide, but there are several clues they are considering. NBC's Kelly O'Donnell reports.

"Public transit advocates seized on Monday's commuter rail crash in Washington to make the case for overhauling the country's transportation system."