believe it when we see it. conflicting signals as the pentagon warns that russia has, in fact, increased its military capability near the ukrainian border over just the last 24 to 48 hours, could invade in the pentagon's view with little or no warning. i'm told some russian units moved into combat positions and the u.s. is on alert today for a possible russian false flag event. we do begin this morning with cnn senior international correspondent matthew chance. he's here with me in kyiv. we also have cnn senior national security correspondent alex marquardt in zaporizia in the southern part of the country. you followed and covered russia in years, lived in russia and vladimir putin often sending conflicting signals. often don't tell the truth but claiming to be reducing forces and open to diplomacy. what signs do we have that's