As Independence Day approaches, federal agents are working to educate the public on the dangers of illegal explosives, like this handcrafted tennis ball bomb, which busted a hole in a thick sheet of press board. The demonstration in Clackamas included detonation of a homemade "sparkler bomb" which took off the hand of a mannequin and a professional-grade firework that busted another mannequin to pieces. Explosives agent Brennan Phillips says all suspicious fireworks should be reported to law enforcement.