A middle school student who defected from North Korea reacts as she listens to a fellow student's letter for a North Korean grandmother, who remains in the North, during their school's foundation anniversary at the battlefield of Baengma Goji (The Battle of White Horse) near the demilitarized zone in Cheorwon, about 77 km (48 miles) northeast of Seoul, March 2, 2011. About 140 students from Hangyeore Middle and High School for North Korean teenage defectors took part in the ceremony on Wednesday to bless their North Korean relatives, who remain in the North, and hope for the reunification of the two Koreas. The battle is one of the fiercest conflicts in the history of the 1950-53 Korean War. REUTERS/Jo Yong-Hak (SOUTH KOREA - Tags: POLITICS CONFLICT ANNIVERSARY EDUCATION)