how much time do ukraine forces need to get acclimated to new systems? clearly not something that happens in a matter of minutes or hours? that s true. i think that s why we have been very careful what we send. sbich blades are fairly user friendly. artillery is what they already have. trucks and armored personnel carriers and helicopters are very easy for them to operate. they re old russian helicopters. it s those other pieces of equipment that we haven t sent because of political decisions like, perhaps, patriot missiles, and other jet fighters, where we ought to be pulling ukrainian officers out of country now and training them in anticipation of a decision being made to bring them in. the city of mariupol refused a russian surrender ultimatum. so looking at the full context of what s going on here, what would be the impact? the impact of the loss of that port city for ukraine?