This is NOT the authorized 9/11 tour, and we quickly realized this when we were taken across the street to an underground area and our guide told us that one of the security guards might force us to leave because the guard doesn’t like him. He was a scattered guide that zig zagged us around the geographic area giving us NYC history/trivia. That was NOT what we were here for. He showed us stock 9/11 photos from a dirty three-ring binder. When we finally did get to the museum, we didn’t have time to get through it. We will have to come back on our own. One World Observatory is not worth the extra money. The museum is worth the money, and we will come back for that.