Early ideas suggested blunting the nose of the plane to prevent the pressure waves joining up to form one intense shock wave, or lengthening the plane without increasing its weight to dampen the noise.

CNN: Bang goes the sonic boom

There is also the pressure to copy reforms that have succeeded elsewhere, much like the wave of privatisation that spread across Europe from Britain.

ECONOMIST: Europe��s businesses, yearning to breathe free

There was a huge wave of selling pressure in the markets in the hour before that window.

FORBES: Some Agreement on Speed Bumps for Market Panics

The device is a hinged flap connected to the sea-bed which uses wave power to deliver high-pressure water to an onshore turbine.

BBC: Commercial hopes for wave energy

High demand for water amid the heat wave and problems with soil shrinking as the ground warms has resulted in burst pipes and low water pressure in Oklahoma City, prompting officials to issue mandatory water-use restrictions for the first time in at least a decade, according to utilities department spokeswoman Debbie Ragan.

CNN: Heat advisories issued to states dwindles to 15