Most fireworks are launched from rows of steel tubes secured in troughs of sand. The tubes, or "mortars," are three times as long as the firework shells but have the same diameter. If a firework ...

Maui police recently seized 107 pounds of aerial fireworks, 95 mortar shells and 40,610 firecrackers that were being shipped from the Mainland to Maui through the U.S. Postal Service. In the boxes ...