U.S. House Speaker Nancy Pelosi landed in Taiwan with a congressional delegation Tuesday in a visit that sparked a military response from the Chinese government. China responded visibly by sending 21 warplanes, including more than a dozen fighter aircraft, through Taiwan's air defense zone the day of Pelosi's visit. After touching down aboard a U.S. Air Force Boeing C-40 Clipper, Pelosi, 82, became the highest-ranking U.S. official to make an ...