35 Years of People

1974 to Now: PEOPLE's Biggest Stories

Celebrate our 35th anniversary with the newsmakers (Princess Diana! President Obama!) who shocked, moved and warmed the hearts of readers over the years

2001: SEPTEMBER 11TH

On the morning of Sept. 11, four U.S. planes hijacked by terrorists crash into the World Trade Center, the Pentagon and a field in Pennsylvania killing nearly 3,000 people. The attacks go down as the worst act of terrorism in the U.S. – and changes the course of national security forever.

Read the full story in PEOPLE's Archive.