Gunmen Open Fire At 15-Year Old’s Birthday Party, Killing 13 – The city of Ciudad Juarez found itself in headlines again in October 2010 after suspected gang rivals stormed a 15-year old boy’s birthday party, killing 13 people including six females. The ages of the victims were between 13 and 32, and the attack got a personal response from President Calderon who vowed vengeance. At public meetings, Calderon would be heckled by parents of the shooting victims.