Calculating Risk

President Barack Obama and Vice President Joe Biden greet returning troops as they step off a plane before attending a ceremony to mark the return of the US Forces - Iraq colors December 20, 2011.

Chief Washington correspondent for the New York Times and WNYC contributor, David Sanger, describes what he sees as the Obama Doctrine—and where the complicated situations in Syria, Iran and Israel fit in. Plus: We’ll talk to the producer of a new Frontline documentary about the nuclear meltdown at the Fukushima Daiichi complex in Japan almost a year later; a NYC Department of Education official on the Teacher Data Reports; and the redistricting battle in Albany.