President Barack Obama signs S. 517, the Unlocking Consumer Choice and Wireless Competition Act into law, Aug. 1 in the Oval Office at the White House in Washington. (Charles Dharapak/AP)The growing confrontation between Washington and Moscow over Ukraine has derailed a recent accord that promised one of the most expansive collaborations ever between the countries’ nuclear scientists, including reciprocal visits to atomic sites to work on projects ranging from energy to planetary defense. It was only 11 months ago that the U.S. energy secretary – Ernest J. Moniz, a former MIT professor who has championed scientific programs that would bury the Cold War competitions between the United States and Russia – went to Vienna to sign the agreement, an indication of how recently the Obama administration believed it had a chance of building on a quarter-century of gradual integration of Russia with the West. More