Kerry: Accounting of past Iran nuclear work not key for deal

Negotiators are concentrating their own efforts about that because they race to satisfy the June 30 deadline to do well in the deal, Kerry said.

"The achievable military dimensions, frankly, gets distorted a little bit within some regarding the discussions because we tend to be actually not fixated in Iran specifically accounting with regard to the issues they would in one point in time or even another," he advised reporters at the State Department by video link from his house in Boston, where he could be recovering coming from surgery on a broken leg.

"We know what these people did," Kerry said. Instead, these people said, the U.S. His comments came amid concerns the Obama adm