Plumes of smoke pour from the World Trade Center buildings in New York Tuesday, Sept. 11, 2001. Planes crashed into the upper floors of both World Trade Center towers minutes apart Tuesday in a horrific scene of explosions and fires that left gaping holes in the 110-story buildings. The Empire State building is seen in the foreground. (AP Photo/Patrick Sison)

(It is so strange to see this image. In July I was on top of the Empire State Building taking pictures and I remember the WTC standing out as one of the main landmarks in the downtown skyline. And now it’s gone…)