Danish cartoonist Kurt Westergaard, who caricatured the Prophet Mohammed and caused outrage in the Muslim world, said Monday he is quitting because he is getting old, the Associated Press has reported. "One has to stop at some point," Westergaard said, adding that he has been working since age 23, first as a teacher and then as an artist. He turns 75 on July 13. Westergaard said he hopes his...