President Obama signs the New START treaty in the Oval Office on Wednesday. Looking on are (from left) Secretary of State Hillary Rodham Clinton and Sens. John Kerry, Massachusetts Democrat, and Richard G. Lugar, Indiana Republican. Missing were most members of the White House press corps. (Associated Press)

President Obama signs the New START treaty in the Oval Office on Wednesday. Looking on are (from left) Secretary of State Hillary Rodham Clinton and Sens. John Kerry, Massachusetts Democrat, and Richard G. Lugar, Indiana Republican. Missing were most members of the White House press corps. (Associated Press)