Japan and the United States pledged Sunday to strengthen their alliance to deal with an evolving security environment in the Asia-Pacific region, as they marked the 60th anniversary of the signing of their security treaty.But they appeared out of sync on how to do that, as U.S. President Donald Trump put veiled pressure on Japan to make a bigger contribution in the face of China's military buildup and North Korea's nuclear threat.At a commemorative reception in Tokyo, Prime Minister Shinzo Abe said, "Today, more than ever, the Japan-U.S. security treaty is a pillar that is indestructible, a…READ FULL ARTICLE