King Charles III addresses the French Senate on Thursday in Paris on day two of a three day state visit to France. Photo by Emmanuel Dunand/EPA-EFE/Pool Sept. 21 (UPI) -- King Charles III addressed the French Senate on Thursday, the first British monarch to do so from the floor of the upper chamber of Parliament, promising lawmakers he would do everything in his power to strengthen the "indispensable relationship" of the two countries. In a 20-minute-long speech, mainly in French, Charles pledged that Britain would always be one of France's "closest allies and best friends." Advertisement He described the late...