In this image made from television, people punch clenched fists during a rally at Kim Il Sung Square in Pyongyang, North Korea, Thursday, June 25, 2009. Tens of thousands of North Koreans shouted slogans to denounce international sanctions at the rally as the communist country vowed to enlarge its atomic arsenal and warned of a "fire shower of nuclear retaliation" in the event of a U.S. attack.