Lawmakers are looking to add $50 million to the fiscal year 2021 defense budget to further development of a prototype "micro" nuclear reactor capable of generating up to 10 megawatts of electricity, a potential capability that could give the U.S. military -- one of the largest energy consumers in the world -- a revolutionary new way to power installations and possibly more. The House Appropriations Committee in its mark of the FY-21 defense spending bill would add $40 million for...