The "Arab Spring" that ousted four authoritarian leaders—including Ali Abdullah Saleh who in late November gave up the presidency of Yemen after 33 years in power—might evolve into a grimmer period with the possibility of a nuclear winter headed into 2012. The International Atomic Energy Agency report that Iran's nuclear program is aimed at producing weapons indicates "a lethal brew when combined with a Middle East that is already in turmoil," said analysts in the Houston office of Raymond James & Associates Inc. "If Washington will not force the issue, Israel almost certainly will." Indeed, Israel's air force unilaterally took out suspected nuclear facil...