Mathias Rust, IIRC.
Real Name: Mathias Rust
Claim To Fame: This is the guy who embarassed the Russians and astounded the world, when in 1987 at the age of 19 flew a Cessna 172B undetected all the way from Malmi airport in Helsinki, landing the craft in Moscow's Red Square.
He was sentenced to 8 years hard labour but released the following August.
Thanks for the following description from SuPi:
"He flew his plane over the sea and then dived under the radar. When he suddenly disappeared from the radar he was first believed to have crashed into the baltic sea. Major search effort was put to place in the coast of Finland before the news came from Russia."
Which showed that cruise missiles would have been the most effective way to hit Russia with little warning.