LOS ANGELES—A South Los Angeles man pleaded guilty today to a federal charge of illegally transporting tons of explosives, including dangerous homemade fireworks that were detonated by police in his neighborhood, leading to a massive explosion that destroyed a specially designed containment vehicle and injured 17 people. Arturo Ceja III entered his plea in Los Angeles federal court to transporting explosives without a license. A sentencing date was not immediately scheduled. Ceja, 26, planned to sell the fireworks throughout the neighborhood in celebration of the Fourth of July holiday, according to the U.S. Attorney’s Office. He made several trips to Nevada in late June to purchase various types of explosives—including aerial displays and large homemade fireworks containing explosive materials—that he transported to his home in rental vans, court papers show. Most of the explosives were purchased at Area 51, a fireworks dealer in Pahrump, Nevada. The complaint notes that fireworks …