Americans In Gaza Warned To Be Ready For Potential Evacuation; Gazans Brace For Potential Large-Scale Israeli Ground Invasion; Half Of Gaza Under Israeli Evacuation Order As IDF Masses Troops; IDF: Forces Are 'Increasing Operations Readiness For The Next Stages Of The War'; First U.S. Charter Flight Departs From Israel With American Citizens On Board; U.S. Intel Warned Of Risk For Hamas Violence Days Before Attack; 72-Year-Old Man Battles Hamas Fighters With Severe Wounds. Aired 1-2p ET

[13:00:00] (BEGIN VIDEOTAPE) ANDERSON COOPER, CNN ANCHOR: There are other shelters like this, other tragedies still to be discovered. The full horror of what happened here is just starting to [...]