Corrected entry: No helicopter can climb more than 5-6 km, and even at 5-6 km height a 5 kiloton bomb would destroy a city. The Hiroshima bomb was actually triggered at a height of about 500-1000 meters to maximise the effect.
Jacob La Cour
18th May 2009
Angels & Demons (2009)
17th May 2009
Angels & Demons (2009)
Corrected entry: Even though the oxygen level of the library is kept at a low level to preserve the books, the room was very large and it would take a long time - even without ventilation - before they would black out.
Correction: Not true. A helicopter has been flown as high as the summit of Mount Everest, a height of 29.000', or 5.5 miles (9 kms). While most helicopters fly well under that ceiling, in the mountains where I live, it is common to see helicopters flying over 18.000' (just under 6 kms) to clear the tops of mountains.
rswarrior