mistake i made was that buzz aldrin was recently in antarcti antarctica. john glenn has been in the hospital since last wednesday. >> cal perry, thanks so much. we will have more on john glenn coming up, but for the moment we're going to switch gears and we're going to turn to new information this hour on the fight against isis. this involves the number of isis fighters that have been killed. hans nichols joins me now. when i first heard about this new number, i actually didn't believe it it's such a large number. explain why the new count. >> it is a conservative estimate, kate. 50,000 isis dead in iraq and syria in the last two years. this is since the hostilities have begun. this would include attacks by u.s. forces from the air, special forces as well as iraqi and kurdish allies fighting on the ground and as well as syria allies fighting on the ground in syria. you know, throughout the pentagon you get a great deal of confidence that bot mosul and