India has extended its naval reach near China—its border and nuclear rival—as one of its warships arrived in South Korea during a deployment across the Indo-Pacific region. The Chinese Foreign Ministry did not immediately respond to a request for comment. India and China—both nuclear-armed, possessing an estimated 180 and 600 warheads, respectively—share the world's longest disputed land border , which spans 2,100 miles. The border has been a flash point for decades, including a deadly clash in