As a young man, I worked in WTC 1. I couldn't believe when 9-11 happened. this is the 2nd time I have been here since but the first time with a tour guide. That is the way to go. Avator Tour does a great job. The guides are very experienced and informative. Our guide highlighted all of the unsung hero's of 9-11. We walk the entire grounds of this area. The park is very nice and full of beauty. They have done a great job with this area. This is a must see.