Fiesta gets underway tomorrow and the Boston Marathon bombings have San Antonio police and firefighters strengthening their presence to make sure people stay safe during the 11-day celebration.
Fiesta is San Antonio's way to honor the heroes of the Alamo and Battle of San Jacinto and it all started in 1891 with a hugely successful Battle of Flowers Parade.
Though the years since have been full of fun and festivities, there was one incident that changed everything.