PEARL HARBOR, Hawaii (AP) — About 2,500 people are gathering at Pearl Harbor to remember those killed in the 1941 Japanese attack that launched the U.S. into World War II.

The crowd observed a moment of silence at 7:55 a.m., the minute the bombing began 72 years ago.

A vintage World War II-era airplane — a 1944 North American SNJ-5B — flew overhead to break the silence.

The Navy and National Park Service are co-hosting the ceremony, which is open to the public.

About 50 survivors have returned to Pearl Harbor for the ceremony.

Former U.S. Sen. Max Cleland of Georgia is delivering the keynote address.

The Vietnam War veteran is currently secretary of the American Battle Monuments Commission, which is responsible for managing overseas cemeteries for fallen American troops.