Chinese military warplane flights around Taiwan have declined sharply while warship incursions continue to be detected around the self-ruled island in the run-up to a planned summit between President Trump and his Chinese counterpart. Taiwan military authorities reported Monday that no jet or drone incursions had been recorded over nine of the previous 10 days. Analysts said the reduction was dramatic. The jets and drones often crossed the dividing line down the center of the 100-mile-wide