>> let me ask you while we're on middle east, mr. secretary, the biden administration, president biden when he was campaigning, said as soon as i become president, we'll rejoin the iran nuclear deal. the iranians said the same thing. we're now four months into the administration. nothing has happened. both sides said there seems to be something of a standoff. iran, it is meanwhile busy enriching the thing that people like you warned about when joe biden was campaigning. isn't this a failure of diplomacy. shouldn't you guys have been able to get back into the deal within a week or two? >> two things. first, the steps that iran is taking underscore the urgency of trying to get iran back into compliance with its obligation under the nuclear deal. a deal that stopped the dangerous aspects of the nuclear program, the prospects that they have could have material for a