American Kayla Mueller: A calling to ease others' suffering

Kayla Mueller, who died as a hostage of IS jihadists, took strength during captivity in her faith in God and the love of her family, she wrote in a letter relatives released on Tuesday. "I have been shown in darkness, light + have learned that even in prison, one can be free," said a handwritten letter by Mueller which was smuggled out by fellow captives following their release by Islamic State jihadists. In the letter released by her family after the White House confirmed her death, s