There was a major bullion safe at the WTC when it collapsed. Crews dug for a month to reach it, expecting all the gold, silver, and platinum coins to be destroyed. They found out that they were all untouched. So they made the decision to hire a coin grading and sealer company (Pcgs) to grade and permanently seal the coins in holders. Then they were sold for charity causes for 9/11. You can buy these coins on eBay or other reputable coin dealers. I post this here because these coins are a truly historic way to never forget and most people don't know of their existence. Here's a link if you want to know more. http://www.wtc911coins.com/about/