From Matt Grandstaff of Bethesda Softworks:
Over on the official Fallout 3 site, we’ve added 3 more screenshots for your viewing pleasure. The screen above shows a glimpse of your character moving through the wasteland with your canine companion, Dogmeat. The second image features a Super Mutant firing a minigun on the National Mall (you’ll notice the Capitol Building in the background). Lastly there’s a screen showing the Charisma pages from the children’s book, “You’re SPECIAL,” a book that helps you understand the core stats of your character (Strength, Perception, Endurance, Charisma, Intelligence, Agility and Luck) early in the game.
To get a better look at these screenshots, head over to the official site.