Should a flight be canceled if only five passengers are on it? American Airlines decided to go ahead with the Chicago-Heathrow flight on February 8, and now environmentalists are giving them flak. On one hand, it seems like a lot of fuel to burn for five people (but lucky for them); on the other, American says it had to get the plane to London for its next flights, and to cancel it would've been disruptive. What do you think? If you'd been on the flight, would you have felt guilty?