If knowing is half the battle, we lost the war, because yesterday was the first day of the three-day G.I. Joe Convention at the downtown Marriott, and it went completely unnoticed. Because it’s Frivolous Friday, here’s a bonus link: parody videos clips of all the G.I. Joe “And Knowing Is Half The Battle” PSAs. But if that’s not your thing, there’s always JemCon2005.