fighters who are coming to ukraine in large numbers, by the thousands, to volunteer to fight and help ukraine defend itself. so that was sort of russia's response to the aid coming in. it was a big and very dangerous signal, i think, to the west. but since that happened, the west has continued to send more aid, the aid has continued to flow in, and be redistributed within ukraine, which is a big logistical challenge. so far, ukrainians are handling it well. >> let's take a look at your picture, right here, one of many. this one, a father with a young child in his arms running. others behind him appearing to scramble for safety. people falling to the ground. what was going on there, how were you able to capture this moment? >> frederica, thank you for inviting me here to speak about a picture where we saw people on the ground, yeah, correct.