And like many pundits, Helm says the door is still open for a deal between Microsoft and Yahoo!

FORBES: Microsoft-Yahoo! Saga Isn't Over

They have made their choice so far, although the door is still open.

WHITEHOUSE: President Obama Holds News Conference

So our view is that the door is still open.

WHITEHOUSE: Press Briefing by Deputy Press Secretary Bill Burton

But he kept going, and the door is still open.

WHITEHOUSE: The White House

Russian deputy energy minister Ivan Matlashov said "the door is still open for Lukoil", and he expressed his hope that the contract would not be awarded to any other company.

BBC: Russia strikes Iraq oil deal

But he tried, and the door is still open.

WHITEHOUSE: The White House

With that kind of smooth flying, is the door still open for Dreamliner to realize its promise as the game-changing airliner of the future?

CNN: Can the 'game-changer' still live up to its name?

Still, in such a new industry, talent is rare and quality low, leaving the door open to foreigners with more experience.

CNN: ASIANOW - TIME Asia | Television: Uncanned Laughter

After a couple of incarnations, Lombardi's Pizza is still open in Little Italy after 100 years, usually with a long line snaking out the door.

NPR: Pizza Goes Back to Its Roots