Has that changed at all the view of White House officials that a no-fly zone would be of limited effectiveness?

WHITEHOUSE: Press Briefing

Ten years after the grim September morning on which Islamist terrorists smashed hijacked airliners into the World Trade Center towers in Manhattan and into the Pentagon - and failed to fly a fourth into the Capitol or the White House - Americans have cause to reflect with pride on their government's successful prevention of further attacks.

CENTERFORSECURITYPOLICY: Center For Security Policy

After Atlantis touches down in Florida, it is unlikely to fly again - the White House wants to discontinue the entire shuttle programme.

BBC: Atlantis set for 'final' return

He accused the Obama administration of ruining the atmosphere for peace talks simply by suggesting that the White House may, at some point, consider imposing a no-fly zone.

NPR: 3 min 58 sec