"Our terrorism is against America. Our terrorism is a blessed terrorism to prevent the unjust person from committing injustice and to stop American support for Israel, which kills our sons," he said in the video.
Long before the Sept. 11 attacks, bin Laden was known as an enemy of the United States. He was suspected of playing large roles in the 1998 bombings of two U.S. Embassies in Africa and the attack on the USS Cole in the Yemeni port of Aden in October 2000.
In addition, authorities say bin Laden and his al Qaeda network were involved in previous attacks against U.S. interests -- including the 1993 World Trade Center bombing, failed plots to kill President Clinton and the pope, and attacks on U.S. troops in Saudi Arabia and Somalia.
Bin Laden also used his millions to bankroll terrorist training camps in Sudan, the Philippines and Afghanistan, sending "holy warriors" to foment revolution and fight with fundamentalist Muslim forces across North Africa, in Chechnya, Tajikistan and Bosnia.
Until the capture of one of his top al Qaeda lieutenants in March 2003, there had been no confirmation of his whereabouts -- or even that he was still alive -- since late 2001, when he appeared in a series of videotapes later released to news organizations.
In recent years, several audio recordings of bin Laden have been authenticated by U.S. officials and made public. In an 18-minute videotape weeks before the 2004 U.S. presidential election, bin Laden threatened fresh attacks on the United States as well as his intent to push America into bankruptcy.