The recent revelation that the head of Media Matters walked the streets of Washington with a Glock-toting bodyguard may make it a little awkward for the group the next time it seeks a donation from a gun control advocacy group. Media Matters reportedly took more than $400,000 from the Joyce Foundation specifically earmarked to promote a $600,000 initiative on "gun and public safety issues." At the same time, Media Matters' gun-guarded boss David Brock reportedly obsessed over his own security. ....Brock reportedly told confidantes that he feared for his safety and needed hired guns to keep him safe.