NEW YORK - President Barack Obama has arrived in New Yorkfor a solemn visit to Ground Zero where he will try to bury the memory of Osama bin Laden by honoring those who died in the Sept. 11 attacks on the World Trade Center.

Obama will hold private talks with 9/11 families and first responders and lay a wreath at the 9/11 memorial as he seeks to let New York have a memorial moment uniquely its own.

Obama's visit comes as new details emerge of Sunday's daring raid on bin Laden's Pakistan compound. A senior defense official said Thursday that only one of the five people killed in the raid was armed and fired a shot - an account that differs greatly from original administration portrayals of an intense firefight.

Scores of uniformed, plainclothes and undercover officers are on the streets of New York City for President Obama's visit.

Drivers are urged to avoid Manhattan today and are encouraged to take public transportation amid the visit. Streets are subject to random closures, especially in lower Manhattan and in Midtown.

AP wire services contributed to this report.