Muller remembers hearing violent knocks at the door of her Paris apartment late one night.

VOA: standard.2010.04.10

And every night, late at night, I turned the lock of his door and opened it C oh,so gently! And then, when I had made an opening big enough for my head, I put in a dark lantern, all closed that no light shone out, and then I stuck in my head.

VOA: special.2009.05.16

Outside at the head of the line, Luca and Andre Bucci of Hamilton, Ontario are almost to the door.

VOA: standard.2010.02.16

And as professor Von Heijne says, their understanding of the mechanisms at work has opened the door to others seeking new treatments.

VOA: standard.2009.10.07

His military and civilian advisors have provided the president with a range of options, and there have been a number of lengthy closed-door meetings at the White House.

VOA: standard.2009.11.13