The Missing Class

Seven thousand pairs of shoes, representing the children killed by gun violence since the mass shooting at Sandy Hook Elementary School in 2012, are spread out on the lawn on the east side of the United States Capitol in Washington, D.C., United States intended to urge Congress to pass gun-reform legislation. Photo: Chip Somodevilla/Getty Images.

Empty Shoes

The lawn outside the United States Capitol is covered with empty shoes to represent the 7,000 children killed by gun violence since the Sandy Hook Elementary School shooting, in a display organised by the global advocacy group Avaaz. Photo: AFP/Saul Loeb.