activity that can spiral out of control. we know patriot air defense batteries are in eastern europe and more are expected to be put there. that will be the main defense of nato say are space in the east. we know there is a u.s./russian deconfliction hotline. where someone in the u.s. can pick up calls, hopes somebody answers it. they have tested it but in an emergency, can they get in touch with russians very quickly. we also know that u.s. satellite and reconnaissance aircraft are able to significantly monitor airspace and understand if something that s launched has gone off its trajectory. so there are mechanisms to try to avoid sudden, inadvertent, unexpected crisis. but keep in mind, nato this week said it wants to beef up its presence in evastern europe, moe