A bullet train running at a speed of 280 kilometers per hour had a door open during its journey from Sendai in northeastern Japan to Tokyo on Wednesday, but no passengers were injured, its operator East Japan Railway Co. said.The incident in the morning lasted 40 seconds, with the door being completely open at one point, and is a rare occurrence for the Japanese shinkansen known for its safety and punctuality.The problem was caused by a cleaner who forgot to close the car's device that manually opens and closes doors, the train operator said.The conductor of the Hayabusa No. 46 bullet train…READ FULL ARTICLE