Numerous warnings had been made available to the intelligence community and military command, and up to "ten incidents reported suggesting that the Khobar Towers are under surveillance" from April to June 1996. These warnings came both before and after the beheadings of four Saudi nationals after their publicly confessed role in the November 1995 attacks in Riyadh. Clinton Administration officials admit that they "received a wave of threats against Americans and American installations in Saudi Arabia" in the weeks leading up to the attack, "but failed to prepare adequately for a bomb of the power that killed 19 American military personnel." Threats were also downplayed by the Saudis when Defense Minister Prince Sultan bin Abd al-Aziz al-Saud characterized acts carried out by Saudi Islamic jihadists in 1995 as "boyish", and stated that the Saudi "Kingdom is not influenced by threats". Senator Arlen Specter (R-PA) commented during a Senate intelligence committee meeting by saying "there was no intelligence failure ... there had been more than 100 intelligence reports on alerts of a general nature, and very specific reports" of an extant and present threat to the Khobar Towers complex.