The downing of a Malaysian passenger aircraft in Ukraine may stiffen Obama administration resistance to providing heavy armaments to rebels - or even besieged governments - seeking U.S. help in hotspots around the world.
Russia's War Against Ukraine
Bloomberg: Obama reluctance to arm rebels stiffened by airliner strike (VIDEO)
US President Barack Obama speaks outside the Oval Office at the White House in Washington, DC, on July 21, 2014.
