An accused Russian spy boasted that infiltrating the US was easy. He's now in prison after getting caught with files that blew his cover.

• Secret messages from court documents give a look into the wild life of an accused Russian spy.
• The DOJ accuses Sergey Cherkasov of operating undercover in the US, and got a cache of his messages.
• He boasted wildly about his false identity, writing "We fucking did it!!! AAAAAAA." Then his luck ran out.

Court documents containing secret messages purporting to be between a Russian spy and his handler give a wild look into a decades-long cover story that later dramatically fell apart.

The messages were contained in charging documents made public by the Department of Justice, which is bringing an espionage case against Sergey Cherkasov.