of schools worked the crowds. >> all our children are safe. that's the blessing. we are all safe. >> reporter: david camp, a parent here, told me there is nothing like safe kids. this is no way to start the school year, parents only in their second week of school, children telling us stories of hiding underneath their desks when they heard the gunfire. police are now saying that they believe the gunman may have had explosives on him. steve osunsami, abc news, decatur, georgia. >> a suspect in custody this morning as police and volunteers step up their search efforts for a missing missouri girl. 12-year-old adrianna horton had been with family and friends at a park when she disappeared monday. one witness said they say they saw horton get in a pickup truck. a suspect in custody, bobby born jr. >> it's not like it was when you grew up. and i grew up. we have new people coming in here all the time. you don't even know who they are, where they're from. and what upsets me the most is,