Federal Judge Lewis Kaplan is set to sentence Khaled al-Fawwaz early Friday.
The attacks in Kenya and Tanzania killed 224 people including a dozen Americans.
Al-Fawwaz's defense lawyers have asked that he be sentenced to less than life in prison, saying he was less culpable than others.
But prosecutors say al-Fawwaz was an al-Qaida leader who helped bin Laden make sure his 1996 declaration of war against the United States reached the world. They say he also led a terrorist training camp and a terror cell.
The Saudi Arabia-born al-Fawwaz was extradited from Great Britain in 2012.
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