In the Mediterranean, a Libyan coast guard vessel fired warning shots Wednesday at a humanitarian aid ship that was assisting migrants trying to cross from Libya to Italy, boarding the ship and demanding that the refugees on board be handed over. Members of the aid group Mission Lifeline say they refused to comply with the request, which came in international waters. Italy has largely financed, equipped and trained Libya’s coast guard in an effort to turn migrants back to Libya, where they face appalling conditions in migrant camps, as well as the threat of torture, sexual abuse and forced labor.