1. Power House Mechanic Working on Steam Pump [1920]
Lewis Hine ( )
This photo is one of the most famous of Hine’s series of "work portraits", showing working class Americans in industrial settings.

2. Monolith, The Face of Half Dome, Yosemite National Park [1927]
Ansel Adams ( )
Adams used special filters to heighten the tonal contrast in his photographs. When discussing this image of Half Dom, he stated, “I had been able to realize a desired image: not the way the subject appeared in reality but how it felt to me and how it must appear in the finished print”.

3. Behind the Gare St. Lazare, Paris [1932]
Henri Cartier-Bresson ( )
Henri Cartier-Bresson (August 22, 1908 – August 3, 2004) was a French photographer considered to be the father of modern photojournalism, an early adopter of 35 mm format, and the master of candid photography. He helped develop the "street photography" or "real life reportage" style that has influenced generations of photographers that followed.

4. portrait of Winston Churchill [1941]
Yousuf Karsh

5. Raising the Flag on Iwo Jima [1945]
Joe Rosenthal ( )
Raising the Flag on Iwo Jima is a historic photograph taken on February 23, 1945, by Joe Rosenthal. It depicts five United States Marines and a U.S. Navy corpsman raising the flag of the United States atop Mount Suribachi during the Battle of Iwo Jima in World War II.
The photograph was the only photograph to win the Pulitzer Prize for Photography in the same year as its publication, and came to be regarded in the United States as one of the most significant and recognizable images of the war, and possibly the most reproduced photograph of all time.[1]
Of the six men depicted in the picture, three (Franklin Sousley, Harlon Block, and Michael Strank) were killed during the battle; the three survivors (John Bradley, Rene Gagnon, and Ira Hayes) became celebrities upon their identification in the photo. The picture was later used by Felix de Weldon to sculpt the USMC War Memorial, located adjacent to Arlington National Cemetery just outside Washington, D.C.

6. Gandhi at His Spinning Wheel [1947]
Margaret Bourke-White ( )
Gandhi advocated the boycott of the machine made European clothing as it caused large scale unemployment in India. He took to making hand-made cloth called Khadi that was inexpensive and suitable for poor Indians. Most importantly, it showed Indians how to be self-reliant.  Gandhi worked on his spinning wheel (called Charakha) till his last days, claiming that he felt like he was eating stolen food if he did not work.

7. Earthrise [1969] Earth emerges over lunar horizon.
Apollo – 11 mission.

8. Buzz Aldrin on the Moon [1969]
Neil Armstrong (1930- present)
On July 20, 1969, half a billion people watched as Neil Armstrong became the first person to set foot on the moon.
"That's one small step for man, one giant leap for mankind," he said, before imprinting his boot in the lunar dust. The televised images were relayed to Earth from a camera mounted on a leg of the Apollo 11 lunar module. Armstrong was joined on the moon by fellow crewmember Edwin "Buzz" Aldrin. Above them a third astronaut, Michael Collins, orbited in the mission's command module.
Neil Armstrong took this picture of Edwin Aldrin, showing a reflection in Aldrins visor of Armstrong and the Lunar Module. This is one of the only photographs showing Armstrong, who carried the camera, on the Moon. Aldrin later said, "My fault, perhaps, but we had never simulated this in training." (NASA photo ID AS )

9. Full Earth Showing Africa and Antarctica [1972]
Apollo 17 Mission
Apollo 17 hand-held Hasselblad picture of the full Earth. This picture was taken on 7 December 1972, as the spacecraft traveled to the moon as the last of the Apollo missions.
(Apollo 17, AS )
Also known as “The Blue Marble,” this is the first ever photo of a fully-lit earth.

10. Steve McCurry (1950-present)
Afghan Girl [1984]
Steve McCurry (1950-present)
When he wandered into an Afghan refugee camp in Pakistan in December 1984, National Geographic photographer Steve McCurry captured one of the most famous portraits the world had ever seen. The Afghan girl with the haunting green eyes captivated everyone. McCurry's portrait appeared on the cover of National Geographic in June 1985.

11. [2002]
new York Times Staff
Buzkashy race to catch a small cow riding horses at Charman Babrak (Babrak's Field) in Shah Shahid town in Kabul, Afghanistan
Pulitzer prize 2002

12. [2002]
New York Times Staff
Jay Robbins sobs as he salutes his colleague, emergency medical technician Yarnel Merino, 25, who died in the attack on the World Trade Center.
Pulitzer prize 2002