The companies will issue the alerts that come through the National Center for Missing and Exploited Children to drivers of Wal-Mart trucks nationwide via Qualcomm 's OmniTRACS mobile communications system.

This program expands Wal-Mart's "Missing Children's Network" efforts to the nation's highways and the eyes of the fleet's drivers.

"As the watchdogs of America's highways, truck drivers have the unique ability to help identify and report vehicles and individuals who may be involved in child abductions," said Chris Wolfe, president of Qualcomm Wireless Business Solutions. "By providing timely Amber alerts directly to drivers in their cabs, we hope to assist in rescuing the hundreds of children who are abducted each year."

The Amber Plan is a voluntary partnership between law-enforcement agencies and broadcasters to activate an urgent bulletin in child-abduction cases.