The first known US drone strike against Al Qaeda operatives took place in Yemen on November 4, 2002. The attack, conducted by the CIA, took out a car carrying six suspected militants, including Abu Ali (a.k.a., Qaed Senyan al-Harthi), a former security guard for Osama bin Laden.
Boiling point is the temperature at which vapour pressure of liquid becomes equal to the atmospheric pressure. More is the vapour pressure lesser will be the heat require to raise its vapour pressure . So more is the vapour pressure lower is the boiling point .
What is the effect of pressure on the boiling of water? All liquids, at any temperature, exert a certain vapor pressure. The vapor pressure can be thought of as the degree to which the liquid molecules are escaping into the vapor phase. The vapor pressure increases with temperature, because at higher temperature the molecules are moving faster and more able to overcome the attractive intermolecular forces that tend to bind them together.