As darkness fell, studio lights were set up so that the rescue work could continue.
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The lights dimmed and dimmed some more, and darkness fell upon the Big Room.
That search - which was called off as darkness fell on Saturday - included an RAF Lossiemouth helicopter.
They would go before sunrise or hold it in until darkness fell once again to avoid being seen.
They were largely stood down as darkness fell, with the situation due to be reassessed at 07:00 on Thursday.
Residents said that as darkness fell on Thursday, the fighting died down.
Inevitably, as darkness fell, Matt's dad, Bob Walker, would let loose a two-fingered whistle that shot up Emerald Lane's steep hill like a flamethrower.
At a news conference in Moore, Gov. Mary Fallin said that rescue dogs were being taken around the debris to find people before darkness fell.
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However, there were no further reports of fighting as darkness fell.
The boat continued its journey for several minutes before the captain turned it around to begin the search for Mr Walton, an apprentice builder, as darkness fell.
As darkness fell there was a torrential downpour.
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Thus, when darkness fell that day, a more terrible prospect loomed into view - that unless we are vigilant and prepared, even small actors in the world can inflict catastrophic harm on the United States.
There is no doubt that the circumstances were not helping Murray but there seemed every chance the match would carry over into a second day as darkness fell, only for the Briton to drop serve twice in succession and hand Berdych the win.
He pushed his Red Bull round the visually stunning Yas Marina circuit, brilliantly lit up by floodlights as darkness finally fell on the twilight session, and beat Hamilton's benchmark by 0.141 seconds.
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The incident was even more unsettling because it happened just after night fell, and it is unusual for the air ambulance to fly in darkness, he added.
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