Passenger dragged from United Airlines flight in 'upsetting event'

By Alana WiseNEW YORK (Reuters) - A doctor trying to return home to his patients was dragged by his hands from an overbooked United Airlinesflight, according to social media, embroiling the carrier in its second public relations nightmare in less than a month.The airline was one of the top-trending topics on Twitter as users took to the website to express their anger over the forceful removal of the passenger from United Flight 3411, which was en route from Chicago to Louisville, Kentucky, on Su