WOODBURY - Officials are reminding residents on Long Island that today is day four of the "dirty bomb" drill in the area.
About 150 police agencies will continue to test their response to a possible terror attack.
Yesterday, mock terrorists tried to move materials for a "dirty bomb" through Nassau County and into New York City.
Nassau police set up a checkpoint to test for radiation on Sunrise Highway in Valley Stream.
Vehicles were pulled over if they tested positive for high levels of radiation.
The drill runs through tomorrow.
Officials to move 'dirty bomb' terror drill to LI