Pope Leo has marked his first anniversary as head of the Catholic Church by urging world leaders to calm global tensions and reduce hatred, following a meeting with U.S. Secretary of State Marco Rubio at the Vatican . The pontiff, the first American to hold the office, made his appeal on Friday, a day after talks with Rubio amidst strained relations with Washington. The Pope has previously drawn the ire of President Donald Trump for criticizing the Iran war. During a visit to Pompei , a modern city located about 245km (152 miles) south of Rome near the ruins of a famed volcano eruption, Pope Leo asked worshippers to pray for governments to turn away from violence. He expressed his hope that God would begin "touching hearts, calming rancour and fratricidal hatreds, and enlightening those who have special responsibilities of government." His discussions with Rubio Thursday took place against a backdrop of repeated disparagement from Trump on social media.…