stronger. they warned tehran. >> we're committed that iran should cause mischief in the region, we'll address it resolutely. >> reporter: from the white house to cable tv they sold the merits of the deal. >> this makes the region safer and makes the united states safer and makes the world safer. >> secretary of state john kerry says site inspections will be thorough and faster than the 24-day period that's been reported. >> it could happen in two days. three days. immediately. >> meanwhile the fate of four american hostages in iran remains unclear even as the administration doubled down on its belief that making their release part of the deal would have been unwise. >> what the president and secretary kerry did was worked to keep them separate and to not allow american citizens to be used as bargaining chips in a nuclear discussion with iran. >> little consolation for the