As law enforcement agencies launch their 2003 May mobilization to encourage seat belt use, the latest statistics are offering a sobering reason to support the effort: Nothing kills more teenagers than motor vehicle crashes (45% of people unbelted in a car crash are killed while 60% are killed when unbelted in a pickup truck accident), and more often than not, if a teenager is involved, they were not buckled up. According to data compiled by the National Highway Traffic and Safety Administration (NHTSA), more teenagers and children are killed in motor vehicle crashes than from any other cause and motor vehicle crashes are the leading cause of death for people from 4 through 33 years!