Drawing on his book, Light From Darkness: Nine Times the Catholic Church Was in Turmoil and Came Out Stronger Than Before, historian Steve Weidenkopf answers our questions about the current Vatican deal with China. Is the agreement to let the Chinese government have a say about bishop appointments a return to the days of the Investiture Controversy? Cy Kellett: Is the China deal a repeat of the investiture controversy? Steve Weidenkopf is next. Cy Kellett: Hello, and welcome to Focus, the Catholic Answers podcast for living, understanding and defending your Catholic faith. The long history of…