US marks 22 years since September 11 attacks

First responders work at ground zero after the September 11 attacks (Suzanne Plunkett/AP, File)

Americans are looking back on the horror and legacy of September 11, gathering on Monday at memorials, firehouses, city halls and elsewhere to observe the 22nd anniversary of the deadliest terror attack on US soil.

Commemorations stretch from the attack sites — at New York’s World Trade Center, the Pentagon and Shanksville, Pennsylvania — to Alaska and beyond.