An airline passenger in Thailand had part of her leg amputated this past week after an accident on a moving airport walkway, Thai authorities said. The accident, involving a 57-year-old woman, occurred Thursday in the domestic terminal of Don Mueang International, the older and smaller of two major airports that serve Bangkok, the capital. It’s unclear precisely what happened. Local news media initially reported that the woman’s leg had been pulled into the walkway’s machinery after she tripped