Jacob Anthony Montelongo was sentenced to 3 1/2 years in federal prison while Sean Christopher Steward received a nine-year sentence PHOENIX Two men have been sentenced to several years behind bars for their roles in a gun smuggling ring that was part of the U.S. government's Operation Fast and Furious. The U.S. Justice Department says Jacob Anthony Montelongo was sentenced Monday in Phoenix to nearly 3 1/2 years in federal prison after pleading guilty to conspiracy and dealing guns without a license. Sean Christopher Steward received a nine-year sentence for conspiracy and lying. During the Fast and Furious operation, Bureau of Alcohol, Tobacco, Firearms and Explosives agents hoped to track illegally obtained weapons to high-level arms traffickers, but authorities lost track of many of the guns. The operation led to congressional inquiries. It was exposed after two of the illegally obtained weapons were found at the scene of the 2010 fatal shooting of Border Patrol Agent Brian Terry.