Lars Ulrich says big four are ready to tour US and UK

Metallica's Lars Ulrich says the Big Four Of Thrash could tour the US and UK in 2011.

In an unprecedented move, the legendary Big Four Of Thrash - Slayer, Megadeth, Anthrax and Metallica - shared a stage at Poland's Sonisphere festival in June.

Now Metallica drummer Lars Ulrich wants to put off their previously planned mammoth 'equivalent of The Wall' tour to bring the other big three to the