TSA employees demonstrate one of the newly-installed Advanced Imaging Technology units Friday December 9, 2011 at Ted Stevens Anchorage International Airport. Three units in the south terminal and one unit in the north terminal were slated to be put into use with passengers Friday afternoon. Passengers are asked to remove all items from their persons, with the screening units detecting any remaining anomalies, metallic or non-metallic, concealed in or beneath clothing.

ERiK HILL / Anchorage Daily NewsBuy Photo