A Customs and Border Protection supervisor, Terry “Jiajia” Liu, 39, of Calais, Maine, on the Maine-Canada line spent midnight shifts popping open Homeland Security computers, ripping out the good processors, stuffing in junk chips, and plugging the wrecks back into the government network. Hidden cameras caught him doing it. Then he traded the stolen Intel parts for store credit. Liu described himself as a native of Guangzhou, China.