Guardian: Barack Obama pressed the start button on the first new construction of nuclear reactors in a generation today, announcing $8.3bn in loan guarantees for the company building two. Obama, in a visit to a job training centre in Maryland, said the loan guarantees to the energy giant, Southern Company, would help launch the first wave of construction of new reactors in nearly 30 years as well as advance his energy and climate agenda. “Even though we have not broken ground on a new …