A U.S. airport is testing out a controversial security screening system developed by the Israelis.

About 70 TSA agents at Boston's Logan Airport are undergoing training in the Spot program. They'll put it to the test in one terminal beginning Aug. 15.

It requires screeners to judge whether a passenger is a possible terror threat based on reactions to a set of specific questions.

A TSA spokesperson would not tell Washington, D.C. television station WUSA what questions would be asked.

"We don't want to give the terrorists a road map," said Kavika Riley. But he did tell the station they would be small-talk type questions about where the person had been or where they'd be going.

TSA agents will be trained to look for suspicious reactions, such as lack of eye contact, while they ask routine questions.

Passengers who raise concerns will be pulled aside for further questioning, pat downs, and full-body scans.

**WEB EXTRA** --  Take a closer look at Israeli security.
Can U.S. Learn from Israel on Airport Security?

Critics charge the program could lead to racial profiling. But TSA spokesman Riley counters in no way is the new pilot program racial profiling.

Others wonder if the TSA is up to such a sophisticated type of screening.

In Israel, passengers are told to arrive at least three hours before take off as they may face dozens of questions with no regard to flight schedules.

Supporters of increased questioning say it is needed in America. Israel's Ben Gurion airport has not experienced a serious terrorist incident in 30 years.

However, Israel has only 2 airports. The TSA is tasked with protecting America's 450 airports.