Thirty years ago today, four kids from California took the stage at Radio City in Anaheim, California completely unaware that their band would one day be among the biggest in the world.

It's hard to juggle all the news surrounding Metallica these days -- summer shows, a new album, a 3D film, their own music festival -- so we can only guess what those guys are going through. While their 3D film isn't set to appear in theaters until the summer of 2013, the band are actively working on the project, and have just announced signing on director Nimrod Antal and producer Charlotte Huggins for the film.

In conjunction with the MusiCares charity, Metallica are offering special bracelets made from the guitar/bass strings of James Hetfield, Kirk Hammett, and Robert Trujillo. Proceeds from the sale of the bracelets will go toward the MusiCares charity.

With a 3D film and a music festival in the works, it's hard to believe Metallica will be able to find time to write and record a new album. That said, that's exactly what they're doing.