WATCH: The Consumer Product Safety Commission used mannequins to re-create 8 accidents that can occur involving fireworks. RELATED: - Fireworks sales expected to ramp up as Fourth of July nears » http://bit.ly/306OwxZ - Nearly 40,000 fireworks recalled ahead of Fourth of July » http://bit.ly/2NlLAMr - Fourth of July fireworks shows in the ArkLaTex » http://bit.ly/2JiZyJQ - Do you know the fireworks laws where you live? We have them for you » http://bit.ly/2KPdw9z - Here are some party tips and c

Authorities are warning Americans about handling fireworks after two fatal explosions within 24 hours. Mola Lenghi reports from Parker, CO where two families were displaced after a firework storage mishap left their homes charred. https://trib.al/uH9amzL | ABC World News Tonight with David Muir