If you buy any new York pass, you have to queue up to change tickets. This pass is equivalent to voucher, and you have to change tickets for this scenic spot. I didn't know anyone who passed away on September 11, but I felt sad unconsciously walking in it. Then the staff members were very happy to introduce the display, and they would cry carelessly. The most difficult thing to bear tears was a husband's telephone message to his wife, which could be heard in it. It will take us at least two hours.