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rate or time frame. the pope says the catholic church needs a "humble and ongoing purification" in response to victims�* claims of clerical abuse. the pontiff met 13 of the thousands of victims known to have been sexually abused by priests in the portuguese roman catholic church. pope francis acknowledged this meant many people now viewed the church with "disappointment and anger". scientists in spain are investigating why increasing numbers of orcas, also known as killer whales, are targeting fishing and sailing vessels, damaging their rudders. one explanation for the fishy behaviour is that it's a game they play. our science correspondent victoria gill reports. are these animals attacking, or playing? for more than an hour, five orcas nudged, rammed and spun this yacht around. it is one of at least 100 incidents this year it's one of at least 100 incidents this year and scientists are trying to work out what's driving the strange, dangerous behaviour. playing with the rudders,