A <a href="//commons.wikimedia.org/wiki/U.S._Customs_and_Border_Protection" title="U.S. Customs and Border Protection">U.S. Customs and Border Protection</a> <a href="https://en.wikipedia.org/wiki/Cargo_scanning#Gamma-ray_radiography" class="extiw" title="en:Cargo scanning">mobile gamma-ray machine</a> clears all cars and trucks entering the Super Bowl venue.
Gerald L. Nino, CBP, U.S. Dept. of Homeland Security
2007-01-29
<a rel="nofollow" class="external free" href="http://www.cbp.gov/xp/cgov/newsroom/photo_gallery/current_events/superbowl02.xml">http://www.cbp.gov/xp/cgov/newsroom/photo_gallery/current_events/superbowl02.xml</a> (file <code>superbowl02.jpg</code>)