gazans when they need to evacuate targeted areas. critics say the system serves no good to those without power or network access. this comes as the idf is urging people in parts of southern gaza to evacuate their neighborhoods. israel is searching for and targeting hamas leaders in the south. the idf says, these leaders of hamas are hiding among the civilian population. today in dubai, vice president kamala harris stressed the need for israel to protect civilians trapped in the crosshairs. as israel defense itself, it matters how. the united states is unequivocal. international humanitarian law must be respected. too many innocent palestinians have been killed. frankly, the scale of civilian suffering and the images and videos coming from gaza are devastating. joining me now from tel aviv, nbc news correspondent, david noriega, and in washington, d.c., nbc news white house correspondent, aaron gilchrist. david, let s start with you. how is the idf shifting its strategy as