Amanda Curran, 18, daughter of Bullet Blocker inventor Joe Curran, demonstrates how to use a child's bulletproof backpack in the event of a shooting, outside Curran's home in Billerica, Massachusetts Dec 19, 2012. [Photo/Agencies]
South Korean Catholic nuns stand in a line to cast their ballots in the presidential election at a polling station in Busan, about 420 km (261 miles) southeast of Seoul Dec 19, 2012. [Photo/Agencies]