Japan's Kumamoto earthquake, which took place early on Saturday, was upgraded from a provisional magnitude of 7.2 to 7.3. The temblor was felt across wide swathes of southern Japan and triggered a tsunami warning, although the advisory was later lifted. As the situation in Kumamoto continues to escalate, a second quake registering magnitude-5.8 also struck in the region at 03:55 local time. Prior to that, numerous aftershocks jolted the region that had already been pummeled by a series of quakes and aftershocks striking a day earlier. Japanese Prime Minister Shinzo Abe's planned trip to the already quake-ravaged region, scheduled for...