Konami released a few stills from the Metal Gear Solid: Peace Walker PSP trailer seen at E3 2009 during Sony's media briefing.  One of the screens captures all four Snakes from behind.

And in case you missed it the first time, we've also got the actual trailer itself, so you can keep reliving that cardboard box moment.  Good to see Kojima never loses his sense of humor, and that all these years, a cardboard box can still bring laughter to gamers worldwide.