Don't store old fireworks, and watch out for antiques that have been stored a long time but could explode. Guns, shells, powder cans, nitrate movie film, and some chemicals left in old bottles or cans are dangerous. It you aren't sure what you're dealing with, contact your local police or fire department for help. Some explosives, like dynamite sticks or even World War II hand grenades, are unstable and could explode if moved.
