I believe you are simplifying this a little too much...SuperCuts nor Britain has blown up any Americans, at least recently...
The reality is, whover runs these 'terminals at the ports' will be operating under our trust...You and others seem to trust these muzlims more than most of us do...
And sure, there will be some American security but apparently the majority of the security rests with the ownder of the lease of the terminals...
UAE has not blown up Americans either.
Sorry, but all DPW will be doing is hiring US Citizen rent-a-cops to guard their terminals.
The majority of security is operated by US Coast Guard, US Customs and Border Protection and the Port Authority.