[img]http://d.yimg.com/a/p/ap/20100709/capt.c623fe4f343f46c0b5aeea9505cf1a4e-c623fe4f343f46c0b5aeea9505cf1a4e-0.jpg?x=130&y=84&q=85&sig=993Ghv_LXMTFg_4vDv.A9w--[/img]AP - With the conclusion of the biggest spy swap since the Cold War, the U.S. has defused a thorny diplomatic problem quickly and cleanly — and avoided damaging recent efforts to improve relations with Russia. And Moscow has escaped further embarrassment over a group of spies that over the years apparently had little if any success in ferreting out any useful secrets.