NEW : ` The exchange of these individuals ... has been completed . '' Spy swap idea continues with the U.S. Six children of Russian agents have left the U.S. , they say . U.S. and Russia complete spy swap at Moscow airport . Moscow airport the plane landed with 10 Russian agents aboard .
NEW : Spy swap idea continues with the U.S. Six children of Russian agents have left the U.S. , they say . U.S. and Russia complete spy swap at Moscow airport . Moscow airport the plane landed with 10 Russian agents aboard .