Worshipers sing during a Sunday service at the Chapel Mbyo on the eve of the anniversary of the 1994 genocide April 6, 2014 in Mybo, Rwanda. Rwanda is preparing to commemorate the 20th anniversary of the country's 1994 genocide, when...

Halloween, Singing Skeleton with Alpha Channel (Loopable),

Row of Halloween Skulls (Loop)

People gather in front of the White House to protest ISIS and praise the USA after U.S. air stikes on ISIS positions in Iraq helped the Yazidi christian minorities.

Alpha Phi - the sorority where two women were shot and killed and a third injured by Elliot Rodger who went on a killing rampage across Isla Vista and University of California at Santa Barbara Elliot Rodger, 22, the son of a Hollywood...

Auschwitz II Birkenau extermination camp on November 15, 2014 in Oswiecim, Poland. Ceremonies marking the 70th anniversary of the liberation of the camp by Soviet soldiers are due to take place on January 27, 2015. Auschwitz was a...

Auschwitz II Birkenau extermination camp on November 15, 2014 in Oswiecim, Poland. Ceremonies marking the 70th anniversary of the liberation of the camp by Soviet soldiers are due to take place on January 27, 2015. Auschwitz was a...

Auschwitz II Birkenau extermination camp on November 15, 2014 in Oswiecim, Poland. Ceremonies marking the 70th anniversary of the liberation of the camp by Soviet soldiers are due to take place on January 27, 2015. Auschwitz was a...

Auschwitz II Birkenau extermination camp on November 15, 2014 in Oswiecim, Poland. Ceremonies marking the 70th anniversary of the liberation of the camp by Soviet soldiers are due to take place on January 27, 2015. Auschwitz was a...

/ students running from school shooting, sniper on rooftop, ambulance, police vehicles, students in window / SWAT team entering school / teenage boy hanging from window, trying to escape / SWAT team helping student out of window....

/ aerial of kids fleeing from school shooter at Columbine High School / girl crying, kid on stretcher, injured students. Shooting at Columbine High School on April 21, 1999 in Littleton, Colorado (Footage by Getty Images)

Auschwitz II Birkenau extermination camp on November 15, 2014 in Oswiecim, Poland. Ceremonies marking the 70th anniversary of the liberation of the camp by Soviet soldiers are due to take place on January 27, 2015. Auschwitz was a...

Auschwitz II Birkenau extermination camp on November 15, 2014 in Oswiecim, Poland. Ceremonies marking the 70th anniversary of the liberation of the camp by Soviet soldiers are due to take place on January 27, 2015. Auschwitz was a...

exteriors as thousands line up for the first church services following the shooting deaths of nine during Bible Study at Emanuel African Methodist Episcopal Church in Charleston, SC. Dylann Roof, a 21 year old killed the pastor Reverend...

The Emanuel African Methodist Episcopal Church after a mass shooting at the church killed nine people on June 20, 2015 in Charleston, South Carolina. Dylann Roof, 21 years old, has been charged with killing nine people during a prayer...

Victims and family members after life in prison sentence for Aurora Theater Shooting trial of James Holmes

Juror 17 in Aurora Theater Shooting trial explains how the jury decided on life in prison over the death sentence for mass murderer James Holmes

The Emanuel African Methodist Episcopal Church after a mass shooting at the church killed nine people on June 20, 2015 in Charleston, South Carolina. Dylann Roof, 21 years old, has been charged with killing nine people during a prayer...

The Emanuel African Methodist Episcopal Church after a mass shooting at the church killed nine people on June 20, 2015 in Charleston, South Carolina. Dylann Roof, 21 years old, has been charged with killing nine people during a prayer...

The Emanuel African Methodist Episcopal Church after a mass shooting at the church killed nine people on June 20, 2015 in Charleston, South Carolina. Dylann Roof, 21 years old, has been charged with killing nine people during a prayer...

The Emanuel African Methodist Episcopal Church after a mass shooting at the church killed nine people on June 20, 2015 in Charleston, South Carolina. Dylann Roof, 21 years old, has been charged with killing nine people during a prayer...

The Emanuel African Methodist Episcopal Church after a mass shooting at the church killed nine people on June 20, 2015 in Charleston, South Carolina. Dylann Roof, 21 years old, has been charged with killing nine people during a prayer...

The Emanuel African Methodist Episcopal Church after a mass shooting at the church killed nine people on June 20, 2015 in Charleston, South Carolina. Dylann Roof, 21 years old, has been charged with killing nine people during a prayer...

The Emanuel African Methodist Episcopal Church after a mass shooting at the church killed nine people on June 20, 2015 in Charleston, South Carolina. Dylann Roof, 21 years old, has been charged with killing nine people during a prayer...