Devastating wildfires that have destroyed more than half a million hectares in Chile retreated somewhat Sunday, with the help of U.S. and Russian supertanker aircraft and the arrival of specialist teams from other countries. There were 118 fires of which 59 were active, an official from the National Forest Corporation said. Chilean authorities have detained 43 people on suspicion of having started some of the deadly fires that have been burning through large swaths of land in south and central regions of Chile…