israel says it s found, quote, concrete evidence of hamas terror headquarters inside gaza s largest hospital and hamas just acknowledged that hospital, al shifa, is now under the control of israeli forces. a heightened threat of a terror attack on americans. that new warning being delivered by the fbi director at this very moment. plus a high stakes sitdown nearly one year in the making is about to begin. president biden, china s president xi meet face to face. i m sara sidner with john berman and kate bolduan. this is cnn news we are getting new information on the israeli raid at the al shifa hospital inside northern gaza. this is the largest hospital in gaza. a short time ago israeli military officials said that they have uncovered concrete evidence of a hamas terror presence, a headquarters inside this hospital compound. you can see this aerial view of the compound. it s not just one building. it s several buildings. doctors, patient, staff inside the vari