The dollar weakened against the yen on Friday, with tensions simmering on the Korean peninsula and as the boost from heightened expectations of a U.S. interest rate hike in December faded. The dollar was down 0.42 percent at 111.99 yen, on pace to snap a five-day winning streak against the Japanese currency. North Korea said on Friday it might test a hydrogen bomb over the Pacific Ocean after U.S. President Donald Trump threatened to destroy the reclusive country, with leader Kim Jong Un promising to make a “mentally deranged” Trump pay dearly for his comments. “The dollar is coming under a little bit of pressure ... (full story)