What 2 terrorist attacks had the most casualties?

[EndtheWar1]

Answers:
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1. 9/11
2. when a truck loaded with explosives rammed into the central bank in Colombo, Sri Lanka in January 1996.

Bin Laden's Terrorist Acts:
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9/11 World Trade Center
Hotel bombing in Yemen targeting U.S. troops in 1992
The World Trade Center truck bombing in 1993
The bombing of a U.S. military housing facility called the Khobar Towers in Dharan, Saudi Arabia, in 1996
The bombing of two U.S. embassies in Africa in 1998
The bombing of the USS Cole in 2000

Here is the list of Foreign Terrorist Organizations
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Abu Nidal Organization (ANO)
Abu Sayyaf Group (ASG)
Armed Islamic Group (GIA)
Aum Shinriykyo
Basque Fatherland and Liberty (ETA)
Gama'a al-Islamiyya (Islamic Group, IG)
HAMAS (Islamic Resistance Movement)
Harakat ul-Mujahidin (HUM)
Hizballah (Party of God)
Japanese Red Army (JRA)
al-Jihad
Kach
Kahane Chai
Kurdistan Workers' Party (PKK)
Source: U.S. Department of State, 10/8/99*