Authorities ID person of interest as Saudi national in marathon bombings, under guard at Boston hospital  —  Investigators have a suspect — a Saudi Arabian national — in the horrific Boston Marathon bombings, The Post has learned.  —  Law enforcement sources said the 20-year-old suspect …

Powerful Earthquake Strikes in Iran  —  TEHRAN — A powerful earthquake that struck southeastern Iran was felt in several countries in Asia on Tuesday, rocking buildings in the Indian capital of New Delhi, sending panicked resident of Karachi, Pakistan, fleeing into the streets and causing tremors through Persian Gulf states.

As debate begins, Senate background check proposal for gun sales lacks necessary votes  —  Debate on a major overhaul of the of the nation's gun-control laws is scheduled to begin Tuesday in the U.S. Senate, but there were still not enough votes late Monday to assure expansion …

Europe Split Over Austerity as a Path to Growth  —  WASHINGTON — In the last year, the International Monetary Fund has performed a major reassessment of how it thinks austerity harms a weak, financially troubled economy.  But while warning of the perils of slow growth, it still often insists on austerity for just such economies.