Anti-American protesters gathered in Philadelphia and vowed to celebrate the deaths of US soldiers, shocking video revealed. A masked speaker urged the crowd to do 'everything in our power to bring the United States to its knees,' footage posted Tuesday by independent journalist Frankie Scales showed. 'For every US military base that crumbles and for every US soldier who returns home in a casket, we cheer,' he said. That prompted a wave of loud applause from the other anti-American protesters. He went on to praise several terrorist groups, including Hamas and Hezbollah, during the rally as his fiery speech continued....