UK air traffic chaos, the US regional airline market, and will London Heathrow ever get a third runway?

<p>FlightGlobal&#39;s Americas and European Airlines editors take a look at September&#39;s air traffic control system failures in the UK, the wind-down of Spirit Airlines in the USA, and what&#39;s going on in the US regional aviation sector.</p><p>We also examine the age-old issue of whether London Heathrow will ever build a third runway.</p>