i m erin burnett. outfront tonight, iran. we begin with a new report on iran s nuclear program. got our hands on it today. it s an 11-page release from the international atomic agency. they reveal doubts and suspicions about what the iranian government is telling the world about its nuclear efforts. they say their nuclear program is for peaceful purposes. we read the report, and it does not say that iran is making a bomb, but it does say that iran is rapidly expanding its nuclear activity, and we consulted experts, including nuclear scientists and former u.n. weapons inspectors. the iaea in this 11-page report says that iran has tripled its enrichment of uranium since last year. they continue to block inspectors from getting inside a key nuclear facility, one that the watch dog group has been trying to get into for a long time. and the report says that 19.8 kilograms of metal is still unaccounted for. the u.s. government responded to the iaea report today. a scathing response