i m martha maccallum. we have two big breaking story at 3:00 p.m. eastern time this afternoon. israeli forces pressing in to the heart of gaza city now. this is the moment that many have been knowing would come in all of this. it is now underway. we assume that hamas terrorists are digging in in many of the tunnels that we have seen uncovered by the idf. this is really being called an unprecedented city-street-to-street battle. civilians, many of whom have been trapped by hamas essentially, can t get out in a lot of these situations. there s hostages, more than 200 of them some where in this space, including americans that we understand are held somewhere in the city. this is an extraordinarily tense situation with a lot of lives at stake. so our coverage will continue as we get new images from the fight in throughout the course of this hour. also, iran continues to attack us at our bases in the region. our u.s. service members. what is our response? john kirby will join us f