METALLICA, SLAYER, MEGADETH and ANTHRAX — the so-called "Big Four" of 1980s thrash metal — played together for the first time in history this past Wednesday night (June 16) in front of 81,000 fans at the Sonisphere festival at Bemowo Airport in Warsaw, Poland.

ANTHRAX guitarist Scott Ian has posted video footage of the photo call that took place before the Warsaw concert. Watch the clip below.

Several more "Big Four" shows will take place across Europe, with a June 22 concert in Bulgaria to be beamed to more than 450 movie theatres in more than 140 markets in the U.S., along with cities in Europe, Canada and Latin America.

The concert will be broadcast to theatres in high definition. Delayed screenings are planned for Australia, South Africa and New Zealand.

Scott Ian previously stated about the "Big Four" tour: "This is a metal fan's dream.

"Looking at this, not only as one of the bands playing on the show, which is fucking awesome, but from the point of view of a fan of SLAYER and MEGADETH and METALLICA, I just think it's the best show.

"The guys in the bands have all been talking about the possibility of this tour happening for probably 20 years.

"The rest of the world is clamoring for shows.

"Whether we do the U.S. is out of hands. That's a METALLICA question. For this [European run of dates], we kept hearing the rumors and I kept calling Kirk [Hammett, METALLICA guitarist] and he kept denying it and then one time he finally said, 'Yes, it's going to happen, but don't say anything.' I think it's going to be the same with other territories. We're already hearing rumors about other places in the world. And I think eventually it will be a worldwide adventure."



The Hetfield/Mustaine fistbump:

Photos below by Andrew Stuart/Future Grandpa