An American Airlines flight heading from Colorado Springs to Dallas-Fort Worth was forced to divert about 30 minutes after take-off to make an emergency landing at Denver on Thursday evening, whereupon one of the plane’s engines dramatically caught on fire on the tarmac. Passengers were swiftly forced to evacuate, including via wing and emergency slide, and could be seen running for safety through thick smoke with flames behind them. The 172 passengers and six crew on board all survived although 12 people were taken to hospital with minor injuries. On Friday morning the National Transportation Safety Board (NTSB) said it