we debate the american response with two former foreign policy advisers: zbigniew brzezinski and vali nasr. >> woodruff: then, ray suarez gets the latest on detroit's dire financial situation, after the city's emergency manager said it will default on $2.5 billion of debt. >> brown: six months after the tragic shootings in newtown, margaret warner updates efforts to push for gun control legislation. >> woodruff: mark shields and david brooks analyze the week's news. >> brown: and we wrap up our week of stories on food security. tonight, the demand for dairy and what that means for california farmers. >> many people in the industry believe we make too much milk. my view is we don't make enough milk here in california. if you take a global view of the international dairy market, there's actually a shortage of milk around the world. >> woodruff: that's all ahead on tonight's newshour. >> major funding for the pbs newshour has been provided by: >> i want to make things more secure. >> i want to treat more dogs. >> our business needs more cases. >> where do you want to take your business? >> i

we debate the american response with two former foreign policy advisers: zbigniew brzezinski and vali nasr. >> woodruff: then, ray suarez gets the latest on detroit's dire financial situation, after the city's emergency manager said it will default on $2.5 billion of debt. >> brown: six months after the tragic shootings in newtown, margaret warner updates efforts to push for gun control legislation. >> woodruff: mark shields and david brooks analyze the week's news.