After Rubio stumbles, rivals see opening in New Hampshire
Rubio under fire in GOP debate after rise in polls
Fireworks fly as Clinton, Sanders square off
Officials warned of water, Legionnaires' link
Trump campaign shows a different side after Iowa loss
Obama visits U.S. mosque, says impression of Muslims distorted
Developments in New York plane crash
Developments related to the jetliner crash in New York City:
-- American Airlines jetliner en route to Dominican Republic crashes after takeoff from New York's Kennedy Airport, setting homes on fire in Rockaway section of Queens.
-- No immediate word about whether any of the 246 passengers and nine crewmembers on Flight 587 survived.
-- Crash set houses on fire in the densely populated area. At least 15 people reported injured on the ground.
-- Bush administration officials said the FBI believes an explosion occurred aboard the plane. But federal law enforcement official said there was no early evidence of terrorist involvement.
-- White House spokesman Ari Fleischer said there were no unusual communications from plane's cockpit. He said National Transportation Safety Board is leading investigation.
-- All NYC metropolitan-area airports -- Kennedy, LaGuardia and Newark, N.J. -- are closed. Delta Airlines diverts New York City-bound international flights to Boston, Cincinnati and Washington's Dulles airport.
-- Bridges and tunnels into the city are closed except to emergency vehicles. United Nations is partially locked down.