A cell at New York's Rikers Island jail. About 1,000 people die in American jails every year, and about a third of those are suicides. Seth Wenig/AP hide caption

itoggle caption Seth Wenig/AP

Screen shot of a Yik Yak exchange where one person expresses thoughts about possibly hurting him/herself, and others respond. Samantha Braver hide caption

itoggle caption Samantha Braver

Carolyn Walworth is a junior at Palo Alto High School (the main building of which is shown here in 2012). After four recent suicides in her school district, she wrote an op-ed about the stress faced by students in the area, which is home to some of the nation's most competitive public high schools. Ho John Lee/Flickr hide caption

itoggle caption Ho John Lee/Flickr

An Indian National Congress party worker on Thursday pays tribute to Gajendra Singh, a farmer who committed suicide during a candlelight vigil in New Delhi the previous day. Rajay Gupta/EPA/Landov hide caption

itoggle caption Rajay Gupta/EPA/Landov

Missouri Auditor Tom Schweich committed suicide following political attacks during his campaign for governor. His press secretary, Spence Jackson, committed suicide just one month later. Jeff Roberson/AP hide caption

itoggle caption Jeff Roberson/AP

About twice a year, statistics suggest, a pilot somewhere in the world — usually flying alone — deliberately crashes a plane. The Germanwing flight downed last week may be one such case. But most people who fit the psychological profile of the pilots in these very rare events never have problems while flying. Patrik Stollarz/AFP/Getty Images hide caption

itoggle caption Patrik Stollarz/AFP/Getty Images

A stone memorial, surrounded by flowers, has been placed near the site in the French Alps where a Germanwings passenger jet crashed on Tuesday (March 24, 2015). Investigators believe the jet's co-pilot brought it down deliberately. Jeff Pachoud /AFP/Getty Images hide caption

itoggle caption Jeff Pachoud /AFP/Getty Images

Philip Connors' first book Fire Season was about how he spent a few months every year for eight years as a fire lookout, living in a cabin and scanning the horizon with binoculars atop a 45-foot tower in a remote region of New Mexico. Mark Ehling/Courtesy of W.W. Norton & Co. hide caption

itoggle caption Mark Ehling/Courtesy of W.W. Norton & Co.

Bioethicist Peter Singer argues that, under certain circumstances, people should have the right to die at a time of their choosing. Samuel La Hoz/Intelligence Squared U.S. hide caption

itoggle caption Samuel La Hoz/Intelligence Squared U.S.