Russia and the U.S. have completed the biggest spy swap since the Cold War.
Ten Russian spies were traded for four Russian nationals accused of spying for the U.S. in a carefully scripted exchange at Vienna's airport early Friday morning.
Among those coming to America is Igor Sutyagin, a nuclear scientist who says he's innocent of charges he spied against Russia.
Two Russian intelligence agents who were convicted of passing along information on Soviet-era spies will also be released.
Among those leaving the U.S. is 28-year-old Anna Chapman, who insists she only passed along information that could be found on the Internet.
Observers say the case shows the U.S. and Russia are still actively engaged in espionage.
"The Cold War is over but the game goes on," said former FBI Agent Tanya Degenova. "They live here under deep cover and often times they are sleepers. They stay dormant."
Some agents were so secret, even their families didn't know what they were up to.
Juan Lazaro, a teenager, will remain in the U.S. while his parents have been deported to Russia.