Shaped Charges – Sheet of copper going through 1ft of solid steel (2010) [video]
For anyone else who was intrigued and wanted to see more, I found the full documentary here: <a href="https://www.youtube.com/watch?v=k1_sMaMcLG8" rel="nofollow">https://www.youtube.com/watch?v=k1_sMaMcLG8</a><p>Presumably this is of dubious legality, but I can't find any official way to view it online in the U.S., or any recorded media form you can buy.