brianna. cnn has spoken to a number of officials in various governments. and, look, here's what they're looking at. it could start as a cyber attack against ukraine's energy grid. it could be a major movement of russian troops, battalion tanks. they have more than 100,000 troops on ukraine's border. so how is everyone trying to figure out what may come next if, in fact, diplomacy doesn't work. there are aircraft overhead, spy planes, satellites, communications intercepts they're looking at. public statements by russian officials almost every day. and western intelligence officials, however, are offering at least one is, a fairly dire view had this all adds up. let me read to you what one official said to cnn. and i quote, if you look at the lower end options, all of which are executable immediately with little to no warning with the forces that are already deployed, those forces are already in position and in the