Firefighters hold a U.S. flag as they gather to pay their respects at Ground Zero during a 9/11 memorial ceremony on September 11, 2009, in New York City (© Chris Hondros/Getty Images)

【September 11 2014】Flags are flying at half-staff today, and many Americans are observing a moment of silence to reflect on the events that began ten years ago today at 8:46 a.m. EDT, when the first plane struck the World Trade Center in New York City. Here at the site of that attack--Ground Zero, as it's come to be known--families of the victims are attending a special closed ceremony today. You’re invited to visit tomorrow, when a memorial opens to the public at the new One World Trade Center. Explore breathtaking Gallery from the HuluTrip homepage over the past 5 years..