A joint federal and local narcotics enforcement bust in San Francisco has led to a massive seizure of deadly drugs and the arrests of 55 people, according to the U.S. Attorney’s Office. Officials said they seized over 1.04 kilos of fentanyl, over 623 grams of meth, 140 grams of cocaine, 277 grams of cocaine base and over 250 grams of heroin, and made about 55 arrests from early October to early December as part of a joint drug enforcement surge. The surge has led to federal criminal charges against 22 defendants for drug trafficking in San Francisco, according to U.S. Attorney’s Office……