Carlos Greene, the man who crashed a sport utility vehicle through a Capitol Police security checkpoint and then led police on a wild chase through the Capitol in September 2006, was sentenced to nearly six years in prison Thursday. U.S. District Court Judge James Robertson ordered Greene to spend 70 months in prison for the incident, considered to be the worst breach of Capitol security in years. Greene’s prison term will be followed by 48 months of supervised release, according to the judge’s order. Greene, a resident of Silver Spring, Md., pleaded guilty to possession of cocaine, unlawful possession of a firearm and ammunition, and assaulting a police officer and resisting arrest in July. Jeffrey Taylor, the U.S. attorney for the District of Columbia, praised Capitol Police Detective Nettie Watts and Officers Robert Garisto, Jason White, Samantha Poole, Jeffrey Fragala, Alvin Green, William Salb, Angela Singletary and Donny Hacker for their help throughout the case. A Capitol Police spokeswoman could not immediately be reached for comment on the sentencing. On Sept. 18, 2006, Greene crashed a silver SUV through a checkpoint at First Street and Maryland Avenue Northeast, which is located near the Capitol Visitor Center construction site. He continued to drive the SUV before bailing out of the vehicle, running up Capitol steps toward the Rotunda, according to Taylor’s office. Greene then managed to get past a Capitol security checkpoint, leading police on a chase through several floors of the Capitol before he was taken down with the help of an employee from the House Flag Office. After a struggle, police managed to subdue Greene and found a loaded pistol in his pants pocket. Officers also found a small plastic bag that had fallen out of Greene’s pants at the scene. That bag contained 15 brown rock-like substances — which later was confirmed to be 9.9 grams of crack cocaine.