Police officers across Iowa are stepping up enforcement of the state's seatbelt law this week and next. Courtney Greene, with the state department of public safety, more than 14-thousand people who weren't wearing a seatbelt died in car accidents in the U-S in 2007. She says in Iowa, nearly half of those killed in in crashes weren't wearing a seatbelt. Greene says statistics indicates motorists are at higher risk during the evening and nighttime hours. The "Buckle Down on Those Not Buckled Up Day and Night" campaign runs through the end of this month.