Manchester Airport to randomly search cars

It was reported recently that people using the Manchester airport will be subjected to random inspection/ searches of their vehicles.

You can read about this HERE in the Union Leader.

Airport Director Mark Brewer said the security measures he announced yesterday were made in light of recent aviation security incidents.

The random inspections of vehicles approaching the airline terminal are designed to be brief and "minimally intrusive" so as not to disrupt passenger travel schedules, according to Brewer.

The stops will be conducted in cooperation with airport security, police and the U.S. Transportation Security Administration. The inspection area is along the airport entrance road, located after an advisory sign that alerts motorists, "All vehicles are subject to search."

All vehicles subject to search?  Perhaps they should reread the 4th Amendment of the US Constitution.

The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no warrants shall issue, but upon probable cause, supported by oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.

Is driving to the airport to pick up your mom coming up from Florida to visit her grandchildren now considered probable cause?

Where are we going to draw the line?  At what point do we say 'No you cannot search us, we've done nothing wrong.'?