The Obama administration has been accused of backtracking on vows to move toward nuclear disarmament following reports it plans to spend more than $10 billion to upgrade its nuclear arsenal. The plan would extend the life of U.S. nuclear B61 gravity bombs stored in Europe and apply new tail fins to make the bombs into guided weapons. Joseph Cirincione, head of the nuclear arms control group the Ploughshares Fund, told The Guardian: “The billions of dollars we are lavishing on the B61 is criminal. This is billions of dollars spent on a weapon whose mission evaporated at the end of the cold war,” he said.