NASA is actively investigating the cold fusion (now called LENR) science. They want it to power electric machines on earth and space planes! In LENR some odd quantum events bypass the coulumb barrier and allow nuclear transmutation and energy generation. The hydrogen gas is absorbed into a metal lattice and depending on a number of factors (loading gas density, element properties, external enviornment) a reaction occurs that CHANGES the metal and releases energy.
A good theoretical model is called the windom-larsen theory. Quantum tunneling is induced making protons appear in the nucleus of metal atoms thus changing the atom. These quantum effects known as non-locality or "spooky action at a distance" overcome the charge repulsion that keeps atoms seperate (coulumb barrier) NASA cold fusion work
BILL GATES IS CURRENTLY WORKING WITH THE ITALIAN GOVERNMENT THROUGH ENEA TO DEVELOP PANTELLI'S COLD FUSION. FUNDING FROM GATES FOUNDATION OF A BILLION DOLLARS!!!