One victim had recently returned home after decades working abroad to enjoy a retirement filled with travel and family time; another hoped the trip into the beauty of Indian-administered Kashmir would cheer the spirits of his semi-paralyzed wife.

NEW DELHI — A deadly attack on tourists in Indian-controlled Kashmir has again moved India and Pakistan closer to war as the two rivals downgraded diplomatic and trade ties, closed the main border crossing and revoked visas for each other’s nationals.