Minnesota law enforcement officials and businesses have stepped up security since the bombings of Afghanistan began Sunday. The Mall of America has increased parking restrictions. At the airport, bombproof garbage cans have been moved in front of doors to prevent cars from driving into the terminal...and police have stopped and searched trucks entering downtown Minneapolis. U-S Attorney for Minnesota Tom Heffelfinger is charged with finding ways to prevent future attacks while balancing the rights of citizens during searches. He says people are not being targeted because of their ethnic background or religion.