WASHINGTON (AFP) - The US pledged Tuesday to move quickly to put into force a trade agreement with South Korea after the parliament in Seoul approved the long-delayed deal. "This is a win-win agreement that will provide significant economic and strategic benefits to both countries," US Trade Representative Ron Kirk said in a statement. "We look forward to working closely with the government of Korea to bring the agreement into force as soon as possible," he said. S Korea's ruling party abruptly pushed the trade agreement through parliament after fierce opposition from opposition lawmakers.