for about an hour starting at July 24 2012 ~1900 PDT, July 25 2012 0200 UTC as requested by his daughter who called the control room as she was about to start. I gave her approval, after knowing from a prior conversation with Bram as he was leaving for the night that "the cavity is in a unstable state at the moment for unknown reasons"  and he's left it unlocked for the evening.