MEGADETH bassist David Ellefson has uploaded behind-the-scenes and performance footage from the third and fourth concerts on the band's "Countdown To Extinction" 20th-anniversary tour on September 7-8 at Teatro Caupolicán in Santiago, Chile. Check out the 15-minute clip below.MEGADETH frontman Dave Mustaine previously stated about the band's plans for the "Countdown To Extinction" anniversary celebration, "MEGADETH will be going down to South America, we're going celebrate 'Countdown To Extinction''s 20th anniversary and 'Peace Sells… But Who's Buying''s 25th anniversary, so depending on where we're at we might end up doing more than one show. We're definitely going to do 'Countdown To Extinction' in its entirety and if we get a second night, we'll probably play most of 'Peace Sells'. There's a couple of songs on there I don't really like playing anymore, but other than that, it's a fun record to play." MEGADETH's fifth LP, "Countdown To Extinction" was released on July 14, 1992 through Capitol Records. The band's best-selling full-length CD to date, it was certified double-platinum by the RIAA (Recording Industry Association Of America) for U.S. shipments in excess of two million copies. The album also produced the band's most successful hit singles, "Symphony Of Destruction", "Sweating Bullets", "Skin O' My Teeth" and "Foreclosure Of A Dream".