Obama pushes back on Palin criticism

President Barack Obama snapped back at Sarah Palin and her criticisms about his nuclear defence policy, calling the former Alaska governor "not much of an expert on nuclear issues."
Obama's comments came when asked for a response about a Palin critique that he was like a kid poised for a playground fight who said "Go ahead, punch me in the face and I'm not going to retaliate. Go ahead and do what you want to with me."
"I really have no response," Obama told ABC News. "Because last I checked, Sarah Palin's not much of an expert on nuclear issues."
The interview occurred Thursday in Prague, where Obama signed a treaty with Russian President Dmitry Medvedev that orders both nations to shrink their nuclear arsenals. That deal that must still be ratified by the Russian parliament and the US Senate.
Palin was referring to another development on the nuclear front this week, a rewriting of American nuclear strategy.