9/11 United States President Barack Obama and First Lady Michelle Obama visit the North Memorial Pool at Ground Zero on the 10th anniversary of the September 11 terrorist attacks in New York, New York on September 11, 2011. The President and First Lady are attending the Commemoration Ceremony at the National September 11 Memorial at the World Trade Center Site as they visit each of the three sites that were attacked. .Credit: Kristoffer Tripplaar / Pool via CNP
