>> bret: checking world headlines, iran president accused the u.n. nuclear watchdog group of leaking information to the u.s. mahmoud ahmadinejad is refusing to allow international inspectors unannounced access to the country's nuclear facilities. the allegations come ahead of expected talks with world powers over iran's nuclear program. militants attack a police compound in a high security area of pakistan's largest city killing at least 15 people today. the terrorist strike in karachi was the first major attack in months, outside the northwest tribal regions as the militants seek to overthrow the u.s. allied government there. iraq's eight-month political limbo over forming a new government appeared to be ending today. but reporter david piper shows us optimism quickly gave way to realism. >> the sight of the two main contenders for prime minister sitting down together today raised hopes they were prepared to work together. at the parliament was preparing to vote on the