7 of the most iconic pictures in human history (WARNING: viewer discretion is advised)

Photo by Eddie Adams

It was during the Vietnam War that Eddie Adams captured this haunting image. General Nguyen Ngoc Loan (left) killing a Viet Cong suspect, Nguyen Van Lem (right) during the Tet Offensive in 1968.

Photo by Rex/Gallo Images

Before Nelsom Mandela was to be elected the first ever coloured president of South Africa in 1994, he was subjected to a 27-year prison term. This photo is from the day he was freed. On the right is his ex-wife, Winnie Mandela.

Photo by Sam Shere

This classic image from 1937 shows the Hindenburg (LZ 129 Hindeburg) catching fire and crashing as it tries to dock over Naval Air Station in New Jersey. 36 people were killed in the crash.

Photo by Neil Armstrong/Rex Features

With Apollo 11, planet Earth saw its first humans landing on its own natural satellite, the Moon. Neil Armstrong was the first human that set foot on the Moon. Buzz Aldrin is shown in this iconic picture, also showing the rugged terrains of the Moon. The photographer was Neil Armstrong.

Photo by Richard Drew

Richard Drew captured this image in the horrible moments the Twin Towers were falling during 9/11. It is believed that upwards of 200 people jumped to their deaths from the story buildings.

Photo by Kevin Karter

In 1993, Kevin Karter, a member of the Bang-Bang Club (photograpers) who captured images in apartheid-era South Africa, flew to Sudan. After heading out in to the open bush, he heard weeping. Rushing over, he saw a toddler who had collapsed on his way to the feeding center. He spent 20 minutes waiting for the bird to flap its wings open. He later scared the creature away and the toddler continued to the feeding centre. At first, Karter got a lot of criticism for not intervening, which sparked huge debates. The kid survived, but died of malaria 14 years later. In July 1994, Karter took his own life, writing, "I am haunted by the vivid memories of killings & corpses & anger & pain"

Photo by Malcom Browne

Associated Press photographer Malcolm Browne captured this image of Thich Quang Duc, a Buddhist monk setting himself on fire to protest against the treatment of Buddhists by the regime. The photograph sparked debates in USA on whether or not U.S's association with Vietnam's regime was a good thing.