Deputy district attorney Damon Mosler, chief of the narcotics division points out guns and drugs seized during at a news conference held in San Diego today.(AP Photo/Denis Poroy) SDSU may as well stand for Sold Drugs to Some Undercover after 18 students were arrested today on drug charges. Nearly 100 people -- including 75 students -- have been stung in Operation Sudden Fall, a five-month DEA investigation on the San Diego campus.Agents were involved......