Navy chaplain Father David J. Hammond said Mass in the USS Bonhomme's Star of the Sea Chapel for three Marines who died when their aircraft went down off the coast of Australia.
The pope led pilgrims in praying a Hail Mary for the victims of the attacks at St. Philip's Catholic Church in Ozubulu, Nigeria and at a mission in Gambo, Central African Republic.
Summertime can and should be a time for extra prayer, a moment of peace that allows Christians to savor the joy of their relationship with Jesus and find new strength to reach out with love to others, Pope Francis said.