The photos are from Solaria Sun, and their brief report also makes mention of many a celebrity look-alike on set, including facsimiles for Andy Warhol, Yoko Ono, Jimi Hendrix, and Janice Joplin. Here's Smith, Clement, Smith again, and some background hippies:
Men in Black III has had a strange, interrupted production. The schedule included an extended break between filming of modern scenes and those set in 1969. That break was extended repeatedly to facilitate reportedly extensive rewrites.
Nonetheless, the film will hit theaters in 3D on May 25, 2012. Smith and Jones are returning, along with series director Barry Sonnenfeld. The familiar Men in Black cast members are joined by Brolin, Clement, Emma Thompson, Alice Eve, and Nicole Scherzinger.