WASHINGTON (AP) - President Barack Obama says the nation will never forget the lives of those killed in the Sept. 11 attacks 15 years ago. At a memorial service this morning at the Pentagon, Obama said he is inspired by the resilience of the victims' families. He also praised America's diversity and urged Americans not to let their enemies divide them.

SHANKSVILLE, Pa. (AP) - Hundreds have gathered in Shanksville, Pennsylvania, to honor the 40 passengers and crew who died 15 years ago when one of the planes hijacked by terrorists crashed in a field. For the first time, the ceremony is being held outside the new visitor center at the Flight 93 National Memorial instead of at the granite mall that runs along the crash site.

WASHINGTON (AP) - The government's homeland security secretary says the United States is safer now than it was in 2001 against what he calls "another 9/11-style attack." But Jeh (jay) Johnson says the country is "challenged when it comes to the prospects of the lone-wolf actor." He tells NBC's "Meet the Press" that dealing with homegrown terrorists requires "a new, whole of government response and public participation and vigilance."