Bin Laden recounted his experiences at Tora Bora on an audiotape that aired on Al Jazeera in 2003. He recalled that, on the morning of December 3, heavy U.S. bombing began around the clock, with B-52s dropping some 20 to 30 bombs each.
unwind. 1  to wind off or undo (something wound) 2  uncoil. 3  to straighten out or untangle (something confused or involved) 4  to make relaxed, less tense, etc. 5  to close out (a position in a securities or commodities trade) to sell (a stake in a company, business venture, etc.)
The unwinding activity is manifested by the release of the short DNA from the duplex, which is detected as a faster-migrating DNA band in gel electrophoresis. The unwinding reaction proceeds in a unique direction defined as either a 5â²-3â² or 3â²-5â²polarity with respect to the strand of DNA on which the helicase is bound.