The Watch City is a just a small part of a regional firefighting alliance, but come this summer it may be the hub of its communications during major emergencies. Waltham is one of six cities in Massachusetts chosen to host a $267,000, state-of-the-art Field Communication Vehicle. The vehicles, which include several mobile radios, video links to the state police air wing, onboard weather stations, GPS systems, wireless computers and hydraulic light towers, were unveiled yesterday in Wilmington. Full Story