The nation will remember those killed by the Sept. 11, 2001, terrorist attacks on the World Trade Center and the Pentagon on Tuesday, an event never far from the minds of New Yorkers, Washingtonians and all Americans.

From the panic and grief that gripped the country in the immediate aftermath, to the dramatic special-forces raid that killed the attack’s mastermind Osama bin Laden in Pakistan more than a decade later, the world has changed dramatically.

Events planned to remember the 9/11 attacks on their 11th anniversary will take place around the world. Here are some highlights of the day’s plans.