Things are escalating quickly:
"BREAKING: Crimea Tensions: Ukrainian Air Force now alerted to full combat readiness. All tactical/attack assets are required to be airborne within 15-30 minutes, once and if called upon"
"Ukrainian military units in Odesa region on "battle alert," also Ukrainian Navy and Air Force units on "full alert," according to Ukrainian agencies. Ukrainian President Poroshenko is scheduled to meet at 10 pm local time (1 min from now) w/his military cabinet"
"Russia's state TV claims that Ukraine and unnamed powers in Washington "staged a provocation" near the Kerch Strait "to disrupt the upcoming meeting between Putin and Trump" at the G20 in Argentina"
"Ukraine calls for an emergency meeting of the UN Security Council following Crimea tensions."