SHANGHAI — Flawed equipment and procedures as well as corruption were the main causes of a Chinese bullet train collision earlier this year, the government said, conceding that expansion of the rail network had gone too fast, according to The Wall Street Journal. The July 23 rear-ending of one high-speed train by another in eastern China killed 40 people, injured 172 and resulted in losses exceeding $30 million, the report said. To read the full story, click here.