After the September 11 attacks in 2001 , the YPMB became a source of minor controversy for performing a halftime show parodying the history of jingoism in American media and culture , including patriotic bowdlerization , and addressing the possibility of conscription . A strong negative reaction from a several audience members , including boos ( especially when " War " was spelled on the field ) and angry letters to administrators and newspapers , led the band to limit the often aggressive political content of its shows through at least the 2002 season . Negative reactions were heightened by the fact the show took place on Yale Parents ' Weekend
September 11 attacks
September 11 attacks
Yale Precision Marching Band