The Justice Department urged the U.S. District Court for the District of Columbia October 29 to throw out a challenge by Ralls Corp. to a presidential order barring it from moving forward on purchases of four wind farm projects close to military installations in Oregon. The agency contended that the court lacks jurisdiction over the complaint because the president properly exercised his discretion under the Defense Production Act. The company planned to install wind turbines manufactured in China by the Sany Group.