The man who took over the Massachusetts Port Authority seven months after the Sept. 11 terrorist attacks is leaving to head the new homeland security division of a New York-based communications and security firm. Craig Coy had just earned a $1.4 million, five-year contract extension with Massport, according to The Boston Globe. Massport oversees Logan International Airport, the departure point for two of the commercial jetliners used in the terrorist attacks. During his administration, Coy had installed the nation’s first baggage screening system at the airport.