J A C K S O N V I L L E, N.C., July 2 — More than 80 active-duty Marines and sailors were identified as users and sellers of designer drugs during a two-year investigation, authorities said today. More details of Operation Xterminator, headed by the Naval Criminal Investigative Service, will be released at a news conference Wednesday at Camp Lejeune. Authorities said in a news release that 61 active-duty service members were identified as possible distributors and 23 as designer drug users. Military officials said some were brought to court-martial but did not say how many. Million-Dollar Military...