Millimeter wave technology has yet to be tested in American airports, but the backscatter device will undergo further tests at Los Angeles and New York City airports. The system's speed, effectiveness and durability will be evaluated. "We process two million passengers [at U.S. airports] a day," TSA's Kudwa says. "We need a technology that doesn't break down if it is run for 16 to 20 hours straight." The trials will also determine if Americans are ready for a technology that has been available for security purposes since the 1980s but has not been used because of privacy concerns.
"About 70 percent of the passengers have opted for backscatter" during this first week, Kudwa says. "The public response has been positive and, from a logistical standpoint, things are going well."