What did Osama bin Laden do when he was alive?

Answer 1

Osama bin Laden orchestrated (and carried out) the September 11, 2001 terrorist attack on the twin towers and tried, but fortunately failed, to bomb the White House as well.

Answer 2

Osama bin Laden was a founder of the militant Islamist group al-Qaeda. He was responsible for planning and orchestrating the September 11, 2001 terrorist attacks on the United States, which resulted in the deaths of nearly 3,000 people. Bin Laden was killed by U.S. forces in Pakistan in 2011.