The US expects Iran will take months to live up to its end of a seven-nation nuclear pact that could eventually provide the country relief from international sanctions. A milestone in the agreement was kicking in Sunday with Iran beginning to make major changes to an underground nuclear facility, a heavy
water reactor and a site for enriching uranium. The changes will not happen immediately, and Iran must further constrain its nuclear program before relief from sanctions will occur. Senior administration officials said Saturday they understand it’s in Iran’s best interest to work quickly, but they are only concerned that the work is done correctly. They insisted that no relief from the penalties will occur until the U.N.’s International Atomic Energy Agency has verified Iran’s compliance with the terms of the agreement. They said Iran’s work will almost certainly take more than the two months Iran has projected.