president's authority to one round of strikes carried out over a 60-day period there's a limit on what -- it's temperaturing in the president's authority to wage warn, even though these initially requested the white house, as every white house does. fairly expansive powers? >> yes, they were really looking for a partial blank check. as you said, presidents tend to do that. just one clarification. >> please. >> yes, we have a 60-day expiration date, but another important provision. after the initial use of military force, after the additional punitive attacks, if assad regime does not use chemical weapons again, if the president cannot certify to congress that he's used chemical weapons against, then we're not able to take -- follow on military action. the purpose as articulated clearly by the president, to deter the assad regime from