I was in NYC exactly a year ago. Going to the memorial site and 9/11 museum was a surreal experience. The museum is built on the foundation of the WTC. It's nothing like I've experienced because it's a museum but it's very somber, and rightfully so. They have tissue boxes all around. There's a section where they play the voicemails that passengers on Flight 93 left their friends and family when they realized what was happening. That part really got to me, and I'm not typically emotional. I recommend it to anyone that's ever in NYC.