Wonder. It's dusk on a crisp November day in 1985.

Robert Hanson is behind the wheel of a black sedan, rolling slowly past the entrance to a public park in Vienna, Virginia. His eyes narrow as he spots a pedestrian crossing sign near the entrance, hoping to find a signal from the KGB.

It's been six years since Hansen sold his first batch of state secrets to the Soviets.

Back then, as a junior FBI agent, he began

passing top secret information to the GRU, the Soviet Union's military intelligence

service. But now he's graduated to the big leagues, working with the Soviet's premier intelligence agency,

the KGB.

The collaboration began a month ago when Hanson wrote a letter to a KGB agent selling himself as a

mole inside the FBI with access to highly sensitive material. In the letter

he explained that he would soon mail a box of documents and asked for $100,000 in return.

To establish his credentials and wet the Soviet's appetite, Hanson revealed the names of three KGB agents who had been secretly working with

U.S. intelligence.

Shortly after mailing the box of secret documents, Hanson followed up with another letter

that outlined how to deliver the cash and established

a protocol on how they would signal back and forth in future exchanges.

When Hanson was ready to receive a cash drop, he would leave a small vertical strip of white tape on

the pedestrian crossing sign near the entrance to this park.

And when the KGB had placed the bag, they would replace the vertical strip with a horizontal one. Then once

Hansen had retrieved the cash he would again leave a vertical strip. So as

Hanson looks closely at the crossing sign, he's thrilled to see a horizontal piece of white tape.

Hanson wants to retrieve the package and get home as soon as possible.

His wife just gave birth to their sixth child less than a month ago,

...