LONDON — Five years after a deadly fire ravaged Grenfell Tower and killed 72 people, the families and friends of the victims, as well as survivors and supporters, gathered at Westminster Abbey on Tuesday morning to honor those they lost, and to commemorate a tragedy that is for many still an open wound.
Relatives walked through the abbey’s sculpted door wearing green, Grenfell’s symbolic color, on their shirts, tunics and hijabs. Some wore T-shirts with printed pictures of friends or…