HSINCHU, Taiwan — Taiwanese President Lai Ching-te watched live-fire drills with U.S.-made Abrams M1A2T tanks Thursday, as part of major annual exercises aimed at boosting the island's ability to fend off threats from China. Four of the tanks fired individually, in pairs and as a group at a testing ground south of Taipei on the second day of the Han Kuang exercises that this year are the longest ever at 10 days. The tanks fire both while on the move and in a stationary position and at both