Composition C-4 is recommended in al-Qaeda ’s traditional curriculum of explosives training . In October 2000 , the group used C-4 to attack the USS '' Cole '' , killing 17 sailors . In 1996 , Saudi Hezbollah terrorists used C-4 to blow up the Khobar Towers , a U.S. military housing complex in Saudi Arabia . Composition C-4 has also been used in improvised explosive devices by Iraqi insurgents
blow up the Khobar Towers
Khobar Towers bombing
C-4 (explosive)