It ended some 10 hours later with a relieved fist pump for a key par that kept him in the mix for another green jacket.

NPR: Snedeker, Cabrera Tied For Lead At Masters

The key piece of hardware is a special pump.

NPR: Space Toilet Awaits Repair Mission

The key is the drilling and management of several dozen boreholes around London to pump out about 70m litres (15m gallons) of water a day, equivalent to about 3% of Londoners' daily consumption.

ECONOMIST: London��s sinking