Osama bin Laden killed, buried at sea. Al Qaeda to unleash nuclear hellstorm

SHOT IN HEAD; BIN LADEN IS DEAD.....
Mission was to kill, not capture...
Crowds gather at White House, Ground Zero to celebrate...
Obama: U.S. Carried Out Operation 'At My Direction'...
W: 'No Matter How Long It Takes, Justice Will Be Done'...
Killing brings anger, relief in Arab world...
Heat on Pakistan...
Hamas condemns killing of 'holy warrior'...
WIKILEAKS: Al Qaeda to unleash 'nuclear hellstorm' if Osama killed...

FEAR: Security Tightened at NY Airports, World Trade Center Site...