It turns out that 13 is a lucky number, especially for the 13 First Presbyterian Christian Academy seniors who stepped onto the stage at Fort Stewart’s Main Post Chapel to receive their high-school diplomas Saturday morning. Shannon Hickey, the interim head of school, addressed the outgoing seniors and offered thanks for each student’s dedication before turning to the audience and thanking all the parents who made all the sacrifices needed to get their children to this day. Hickey offered some sage advice to the outgoing Class of 2015.