AP Shows How Headlines and Story Do Not Need to Match

Please compare this headline

  Iran: UN watchdog in error over nuclear program

to this first paragraph

TEHRAN, Iran – Iran's nuclear chief said Tuesday the head of a U.N. watchdog agency made a dangerous mistake by criticizing Tehran for not fully cooperating

Wow! What a difference! Where the headline seems to be saying that Iran is merely saying that the UN made a mistake, but they are willing work with the UN, the paragraph shows us how Iran is, in fact, threatening the UN!
The rest of the article explains what Yuki Amano, the head of the IAEA, said.(Read it all here)