Ted Kaczynski, the man who set off more than a dozen bombs and became known as the “Unabomber,” has died.

Kaczynski went nearly 20 years without being captured and terrorized the country each time he set off homemade explosives, often through the mail.

On Nov. 15, 1979, an American Airlines flight flying from Chicago to Washington, D.C., filled with smoke after a bomb made by Kaczynski detonated in the luggage compartment. The plane was able to land safely, and no one died, but the bombings continued.

Six years after that incident, in 1985, Kaczynski left a bomb in the parking lot of a California computer store, killing the store’s owner.