NEW YORK (Reuters) - Colombian artist Fernando Botero's paintings and sculptures grace museums and public spaces around the world, but he suddenly had trouble exhibiting his work in America when the topic was Abu Ghraib. A series of paintings depicting U.S. military abuse of Iraqis in Abu Ghraib prison was rejected by all the U.S. museums to which it was offered before it found a home at the Marlborough Gallery in Midtown Manhattan, where it opened last week and will remain on display until November 18. "Here there is total freedom of expression. That's why it was so alarming that...