Wednesday, August 12, 1998 Published at 02:31 GMT 03:31 UK
The changing face of terrorism
Investigators are sifting the wreckage for clues to the Nairobi bombing
The bomb attacks in East Africa could be the latest example of a type of terrorism which shows every sign of increasing.
In 1993 six people were killed at the World Trade Centre in New York.
A foiled attack in Bangkok, Thailand, in 1994 had the same hallmarks - a homemade bomb so large it needed to be carried by a truck. It was intended for the Israeli embassy.
And the following year, 19 US air force staff were killed by large truck bomb in Al Khobar.
So far there is no hard evidence pointing to Islamic extremists. But the bombing has been welcomed by some Muslim groups.
Militant Islamists bear many grudges against America.
They despise US for its support of Israel and say the presence of US forces in Saudi Arabia has desecrated Islam's holiest shrines.
John Bolton says: "I think the US is viewed as principal target of Islamic terrorists who are trying - at a minimum - to get the US in effect to withdraw from the Middle East."
New breed of terrorist?
"These groups cut across state lines. They are not beholden to any state and they also are getting a lot of private money," he says.
"This is a problem that cannot be solved by any single state - it has to be the international community."