WASHINGTON (Reuters) – U.S. President Joe Biden on Sunday called on Afghanistan’s Taliban rulers to release a U.S. civil engineer who was abducted two years ago and is believed to be the last American hostage held by the Taliban. Mark Frerichs, a 59-year-old U.S. Navy veteran from Lombard, Illinois, who worked in Afghanistan for a decade on development projects. He was kidnapped a month before the February 2020 U.S. troop pullout deal was signed and was transferred to the Haqqani network , a brutal Taliban faction accused of some of the deadliest attacks of the war. Monday marks his second yea…