Last October, a 15-year-old student and member of the Tulalip Tribes in Washington opened fire at his high school with a gun obtained from his father. The tribe had issued a restraining order against the father, but that information didn't show up in the federal criminal database — so he was able to buy the gun. Ted S. Warren/AP hide caption

itoggle caption Ted S. Warren/AP

Sgt. Barbara Johnson and Corrections Lt. Robbin Preston run the Tuba City Juvenile Detention Center on the Navajo Nation. Laurel Morales/NPR hide caption

itoggle caption Laurel Morales/NPR

The area around the confluence of the Silverthrone and Klinaklini glaciers in southwestern British Columbia provides a glimpse into how the terrain traveled by Native Americans in Pleistocene times may have appeared. David J. Meltzer/Science hide caption

itoggle caption David J. Meltzer/Science

Former band student Rosalee Talahongva in front of her old music building, which is being turned into a Native American cultural center. Christopher Livesay for NPR hide caption

itoggle caption Christopher Livesay for NPR

This clay facial reconstruction of Kennewick Man, who died about 8,500 years ago in what's now southeast Washington, was based on forensic scientists' study of the morphological features of his skull. Brittney Tatchell/Smithsonian Institution hide caption

itoggle caption Brittney Tatchell/Smithsonian Institution

Oglala Sioux leaders and city officials at a press conference following the incident discuss possible charges, which could include child abuse, hate crimes and assault. Charles Michael Ray/South Dakota Public Broadcasting hide caption

itoggle caption Charles Michael Ray/South Dakota Public Broadcasting

Lee Ann Johnson, director of the Missoula Indian Center, encourages Native Americans in Montana to enroll in private coverage through Healthcare.gov at an outreach event on Saturday, November 15. Eric Whitney hide caption

itoggle caption Eric Whitney