The World in Photos This Week

Norway's mass killer goes on trial, the space shuttle Discovery lands in Washington, and North Korea celebrates the 100th birthday of Kim Il Sung.

APRIL 20, 2012

Students and visitors attend a candlelight vigil on campus at Virginia Tech on April 16 in Blacksburg, Virginia. Virginia Tech marked the fifth anniversary of the killing of 32 students and faculty by Seung Hui Cho in 2007, the deadliest mass shooting in modern U.S. history. This is the first year the university has not suspended classes on April 16.

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