Japan says a collision during a nighttime drill caused the deadly April crash of 2 navy helicoptersMedicaid expansion discussions could fall apart in RepublicanChinese authorities to ensure orderly college entrance examA naturally elevating tripTheme park operator offers holiday treatsChina urges universities to add majors that meet social needsChinese researchers develop new algorithm to recognize coronal mass ejectionsSuspect in London sword attack appears in court on murder charge in death of teenage boyPolice arrest Polish teenager suspected of throwing firebombs at synagogueRefugee Team for Paris Olympics has 36 athletes from 11 countries across 12 sports