What was Facebook CEO Mark Zuckerberg doing in Germany, besides getting out of town while another college pal left his company? He was ostensibly guest-lecturing at the Technische Universität-Berlin, but we'll let your imagination run wild. Can you suggest a better caption for this photo? Do so in the comments. Monday's winner: johnyletter, for "I say we nuke the entire site from orbit." (Photo by cpthook)