As more than 40 heads of state convene in Washington for President Obama's nuclear security summit, a new report released today, finds that despite significant progress, the world is not yet on track to meet the Administration's goal of securing all stockpiles of nuclear weapons and weapons-usable nuclear materials, within four years. To meet the four-year objective President Obama set in Prague in April 2009, global leaders must redouble efforts following the upcoming nuclear security summit, shifting the global nuclear security effort onto a faster and broader trajectory, according to Securing the Bomb 2010.