In June 2022, Queen Elizabeth II walked a red carpet at Windsor Castle to ignite a towering tree of light that served as the principal beacon to mark the Platinum Jubilee Anniversary of her reign. Following her lead, her grandson led the lighting at Buckingham Palace and then throughout Britain and the Commonwealth, some 3,500 beacons were lit to honor the occasion.1 A sequence of beacons connecting across the nation first served as an ancient form of communication to warn of invasion, but in...
