Donald “Bruce” Montgomery SM ’57, a highly influential engineer and longtime MIT researcher whose career was focused on the development of large-scale electromagnets, died on July 1. He was 89. Montgomery’s contributions have been pivotal for numerous major facilities in fusion energy, in the design of magnets for particle accelerators for physics and medical applications, for magnetically levitated transportation, and in many other disciplines. He was a recognized international leader in magnet design and fusion engineering, a member of the National Academy of Engineering, and recipient of numerous awards including…