The 10 strategies are as follows:

? Mr. Bulla recommended ensuring standoff distances of at least 100 feet between vehicles and facilities. Three hundred feet or more, he said, is ideal and traffic should be controlled by using metal posts or reinforced planters.

? All deliveries should be scheduled in advance and trucks inspected prior to entering a secured area. If possible, deliveries should be scheduled during non-business hours when the facility or establishment is not heavily occupied, Mr. Bulla counseled.

? He advised having a high-visibility security presence with uniformed officers patrolling all perimeters and parking areas, varying their routes and frequency.

? Mr. Bulla said that allowable hand-carried bags and packages should be inspected, and it should be required that overcoats and jackets be opened or removed when entering a facility or establishment.

? Private and semi-private facilities, he said, should issue employee/tenant I.D. badges, and require visitors to sign in and out. Also, temporary "visitor" I.D. badges should be worn, and hosts should escort visitors at all times.

? Adequate security lighting should be installed, he said, and landscaping maintained in a manner that will provide unobstructed lines of sight.

? Outside trash receptacles in close proximity of facilities should be removed, Mr. Bulla advised.

? Building operators, he said, should be observant for potential surveillance by an outsider of their facility. Most attacks are pre-planned, he explained.

? Unattended packages, bags, and briefcases should be reported.

? Above all, Mr. Bulla counseled, "use common sense and trust your instincts. This is your greatest defense against the most difficult type of attacks to prevent."

These steps, he said, might not prevent a suicide bombing, but they might reduce the extent of injuries and damage by stopping the bomber as far from the infrastructure and occupants as possible.

All facilities, regardless of size, he said, should undertake an objective review of their security posture. Security experts can assess vulnerabilities and recommend best practices and accepted standards to safeguard people, property, and information.

Mr. Bulla admitted that "dishearteningly, suicide bombings are nearly impossible to detect or prevent. Even if, by chance, an attack were recognized, it would be practically impossible to thwart."

Suicide bombers' explosives are often concealed in hand-tailored vests, prostheses, or carried in handbags or backpacks, he said. Mr. Bulla noted that bombers span all demographics, so an accurate profile is hopeless. Therefore, the focus must be on detecting or deterring the surreptitious entry of an explosive device.

"It is impossible, perhaps even injurious, to try and predict specific U.S. targets in the absence of real and credible threat information," he said. "The best defense is vigilance and heightened awareness, regardless of the location."

While there are no universal guidelines or predictors that will prevent an attack, Mr. Bulla said, eyewitnesses and survivors routinely comment that the attacker appeared "suspicious."

"Trust your instincts. Look for the out-of-the-ordinary," he said, citing "the young, pregnant women who lacks a ?glow' of pregnancy, carries no purse, enters, and walks directly to the center of a crowded restaurant. The lone male who fails to mimic the emotions shared by those around him, or otherwise react 'normally' for the situation, be it a celebration, solemn gathering, or other event. Or the man or woman that is overly dressed for the situation or weather conditions. "

According to Mr. Bulla suicide bombers operating within U.S. borders are less likely to be Palestinian militants. He said they are more likely to be domestic terrorists or al Qaeda operatives.

Treadstone said it has done a variety of protection work for large corporations and implemented and managed the security measures for entertainment and sporting venues, special events, and the Olympic Games.