(Source: Biz Journals) Raytheon, a Waltham-based defense contractor, earlier this week said it had acquired Arizona-based drone maker Sensintel Inc. Terms of the acquisition were not disclosed. Tucson, Ariz.-based Sensintel was founded in 1989 and had 50 employees, who will become part of Raytheon Co.'s Missile Systems business. The acquisition wasn't expected to … [Read more...] about Raytheon Acquires Arizona Drone Maker Sensintel