Now there is a large grey area, and an insistent question: are sanctions still the right policy?

ECONOMIST: Iraqi sanctions

Is there anything that you'll be doing specifically in an area like southeastern Michigan that has a very large Arab American and Muslim population?

WHITEHOUSE: Press Briefing on Security Review

There is a large police presence in the Boston suburb of Watertown, where authorities have asked reporters to stay back from the area.

CNN: Key developments in Boston bombings investigation