Davon Cunningham, 35, Roosevelt Richardson, 49, and Arnez Mack, 22, -- all of the District of Columbia -- were sentenced today in U.S. District Court to 126 months, 66 months, and a year-and-a-day in prison, respectively, for their roles in a narcotics trafficking conspiracy that operated an open-air drug market in the Trinidad neighborhood in Northeast. The sentencings were announced by U.S. Attorney Jeanine Ferris Pirro.