Two more shows have been added to this year's European summer trek. Metallica, Slayer, Megadeth, and Anthrax ??? the "Big Four" of 1980s thrash metal ??? are heading to Sweden to play at the Ullevi stadium in Gothenburg on July 3, 2011. Tickets go on sale on Monday, March 7 at 9:00 a.m. local time. Presale for Megadeth fan club members will take place starting Thursday, March 3 from 9:00 a.m. to Friday, March 4 at 9:00 a.m. local time at the Cyber Army. Megadeth is also confirmed to headline a show at Docks in Hamburg, Germany on July 4. Support act to be announced. Tickets are on sale today. Check the Killing Road for details.