we're honored also to have david palmer, major david palmer of the texas department of public safety. major palmer is the former president and board member of the commercial vehicle safety alliance which is an international organization that enforces commercial motor vehicle safety laws, and he's currently a major with the texas department of public safety where he oversees texas highway patrol division's highway safety operations center. mr. william jack dawson is a freight driver with ups. mr. dawson is a professional truck driver in dallas, texas, where he drives for ups. he's been a professional driver for 33 years, and he's currently a member of local 745. he trains new employees in areas of safety, precautions and driver improvement. dave is the senior vice president of public policy and regulatory affairs at the american trucking associate inc., and he's been in that position since january of 2010. he served as vice president for safety, security and options at the hearn -- operations at the american trucking associations, and he was instrumental in working with the safety task

palmer. >> reporter: in london, prime minister david cameron issued a dramatic warning. >> what we're facing in iraq now with isil is a greater and deeper threat to our security than we have known before. >> reporter: isis fighters who now control vast areas of iraq and syria have shown they are violent, organized, and trained to use weapons and explosives. >> you feel like you have no honor. >> reporter: what worries the u.k. government is several hundred of these fighters are british. as the man who murdered the u.s. journalist james foley is thought to be. >> you're no longer fighting an insurgency. >> reporter: at some stage, security forces believe some of these young men may try to return primed and prepared to stage an attack at home. to deal with that threat, the prime minister has said there will be new legislation introduced as early as monday, which could provide, for example, for confiscating the passports of anyone wanting to join isis or even revoking their citizenship while they're abroad so they can't come back. as you can imagine, maurice, it's going to be very controversial