Moscow, Russia (CNN) - A spy swap between the United States and Russia took place Friday at the airport in Vienna, Austria, Russian state media reported.
A plane carrying 10 Russian agents, who were expelled from the United States for intelligence gathering, took off from Vienna, apparently bound for Moscow, Russia, state TV reported.
A separate plane carrying four people convicted of spying for the United States took off from Vienna, too, bound for a destination in the West, according to Russia Today, the state television station.
The elaborately choreographed transfer - reminiscent of a scene from the Cold War - took about an hour, Russian state media reported.
The 10 pleaded guilty in the United States on Thursday for failing to register as foreign agents and were ordered out of the country. They then boarded a U.S.-chartered flight accompanied by U.S. Marshals, a federal law enforcement source said.
Eight years ago today the United States was attacked in what was the worst terrorist attack in the nation's history. Since that day America's leaders have been warning the country that an attack on U.S. soil is imminent.
In January 2002, during President Bush's first State of the Union address, he said "Thousands of dangerous killers, schooled in the methods of murder, often supported by outlaw regimes, are now spread throughout the world like ticking time bombs, set to go off without warning."
Vice President Cheney followed the president's warning a few months later in May saying, "I think that the prospects of a future attack on the U.S. are almost a certainty. It could happen tomorrow, it could happen next week, it could happen next year, but they will keep trying."
America watched nervously, anticipating the worst but no attack came. Since that sunny September morning 8 years ago the United States has been able to stay safe – but how?
The FBI ranks China as one of the biggest espionage threats to the United States over the next decade.
From top secret research to items up for sale on eBay – some of our most intimate national security details could be at risk. Homeland Security Correspondent Jeanne Meserve has the first part of our special series 'Spies Among Us.'