9/11 Memorial and Museum ceremony 2019, live stream

It's been 18 years since the September 11 attacks left nearly 3,000 people dead in the worst act of terrorism the nation has ever experienced. On Wednesday, the 9/11 Memorial and Museum will commemorate the lives lost with a ceremony honoring those killed at the World Trade Center, Pentagon and aboard Flight 93 — as well as the 1993 World Trade Center bombing.