As you've noticed there is a picture of Yellow Cake right between pictures of Judith Miller and Matt Cooper, as well as Karl Rove and Robert Novak in the scroller above. Yellow Cake is refined Uranium ore, so the placement of a bag of regular old cake mix in between these characters is a play on the whole Plame-Gate Scandal that's still brewing. When refined further with nitric acid, Kerosene, and other solvents Uranium ore becomes U-235. According to Dr. Frank Settle's site on Nuclear Chemistry and Uranium Production, "Reactors use both enriched (3 to 5% U-235) uranium metal and uranium oxide as fuel while weapons use more highly enriched uranium (up to 90% U-235)."
I'm no chemist so if UO3(s) + 2H+(aq) --> UO22+(aq) + H2O confuses you, I'm right there with ya.
The technical stuff doesn't matter, and the rest is real simple depending on which side you take. The CIA sent Valerie Plame's husband, former ambassador Joe Wilson to investigate claims that
In retaliation the Administration, through the office of the Vice-President (specifically the VP's chief of staff, "Scooter" Libby) leaked classified information about