WASHINGTON — The Massachusetts Institute of Technology is proposing to build a $450 million research facility at Hanscom Air Force Base in Bedford in a long-term venture that would reinforce the base’s high-tech mission without requiring new federal spending, according to government officials.

WASHINGTON — Administrators at Harvard, Brown, and other elite universities are softening their resistance to the Reserve Officers’ Training Corps more than four decades after the military scholarship programs were driven from campus in the face of fierce antiwar sentiment.