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PMQs: Cameron on Heathrow third runway manifesto pledge

5 September 2012 Last updated at 12:45 BST

The prime minister said "I will not be breaking my manifesto pledge" when asked to rule out a third runway at Heathrow Airport while he was party leader.

Speculation has been growing about expansion at the site since Transport Secretary Justine Green - who campaigned against the expansion - was removed the post in this week's reshuffle.

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