He was given asylum by the Russian government, snatching him from Russian soil would be a major thing that could possibly start a war.
http://en.wikipedia.org/wiki/Poisoning_of_Alexander_Litvinen...
http://edition.cnn.com/2013/07/02/world/americas/bolivia-pre...
I see no shots being fired.
Ha. The US military is just slightly more advanced than whatever North Korea has. In terms of sheer firepower, the US military is formidable. These so-called "lost wars" aren't pitting nation against nation, which is what US vs. Russia would be.
"One US aircraft carrier has a more powerful air force than 70% of all countries." http://www.dump.com/aircraftcarrier/