Bill Clinton actually said...
The terrorist bombing of Pan Am 103 in December 1988 with the resultant deaths of 270 (including 189 Americans), and the terrorist bombing of UTA flight 772 in September 1989 with the resultant deaths of 171 (including 7 Americans), dramatically demonstrate the threat posed by virtually undetectable plastic explosives.
Context
Message to the Senate Transmitting the Convention on the Marking of Plastic Explosives for Detection
06/28/1993