kyiv. trey yingst reporting with the very latest. hi, trey. martha, good afternoon. officials say 400 residents of bucha were killed when russians invaded. we were there when investigations continued. i need to warn you the following images are graphic. this grandmother looks on, trying to make sense of the horror. they couldn t take the explosions anymore. they went to evacuate, she says. the family had lived in bucha for three years after fleeing conflict in the donbas region. we wanted to save them from that war. we got into this one. granny couldn t save her grandson. her voice trailing off. choking back tears. valentina s son and daughter in law were evacuating when their