Tanks roll in Warsaw as Poles celebrate Army Day WARSAW (Poland), Aug. 15 (AP): Tanks rolled down a Warsaw avenue and F16 jets screamed overhead Wednesday as Poland's patriotic and assertive new leaders staged the country's grandest military parade in decades to mark one of its most famous military victories. President, Lech Kaczynski, a nationalist conservative, rode in an open vehicle along Warsaw's tree-lined Ujazdowski Avenue, waving and smiling at a large crowd that had turned out to celebrate Army Day. The celebrations were held nearly two years after ex-communists were defeated by Kaczynski and his twin brother, Prime Minister...