Commemorations are being held around the country and worldwide today on the sixth anniversary of the 9/11 attacks. Here in New York, four moments of silence will be held to mark the times the two hijacked planes hit the towers and when the towers collapsed. It’s the first time the anniversary falls on a Tuesday, the day of the attacks. The Ground Zero ceremony will be held in a nearby park because of increased construction at the trade center site. Firefighters who rescued victims on 9/11 will read victims’ names. The ceremonies will mark the first time a victim who did not die in the attack will be recognized. Attorney Felicia Dunn-Jones died five months after 9/11 from toxic exposure to the trade center dust. Other ceremonies include commemorations near the Pentagon and a Pennsylvania field where the other planes crashed.