Some pictures that made everyone cry.

A surgeon rests after a performing a successful heart transplant operation that lasted 23 hours. His assistant sleeps in the right corner.

A firefighter pauses to give water to a thirsty koala in 2009, when the devastating Black Saturday bushfires rolled through Victoria, Australia, killing 173 people

Eight-year-old Christian Golczynski accepts the American flag for his father, who was shot during his second tour in Iraq, just weeks before he was to return home.

After serving in Iraq for seven months, Terri Gurrola is finally reunited with her daughter.

A man falling from the World Trade Center on 9/11.

Harold Whittles hears for the first time in his life after a doctor fits him with a hearing aid.

Five-year-old Brayden Denton was a superhero superfan who struggled courageously an agressive form of brain cancer, but he succumbed to the disease in 2014 after 30 rounds of radiation treatment. Here, Brayden's pallbearers pay their final respects dressed as the heroes who inspired him to stay strong.

A vulture waits for the malnourished child to die (1992)

A homeless and hungry man eats off a railway track in India

A soldier shot by a sniper hangs onto a priest in his last moments (1962)

John Lennon gives an autograph to his future killer Mark Chapman, few hours before his death. (1980)

A protesting Buddhist monk burns himself to death (1963)

A mother in Somalia holds the body of her child who died of hunger. (1992)

A German soldier returns home only to find his family no longer there - Frankfurt (1946)

Rwanda Massacre - A group of Hutus began slaughtering the Tutsis in the African country of Rwanda. The genocide left 800,000 dead. This photo shows the bloody feet of children attempting to escape slaughter by climbing the walls. (1994)

An Iraqi prisoner of war tries to console his son (2003)

A permanent shadow of a victim of the Hiroshima atomic bombing lies cast on the ground that speaks of the severity of the tragedy that engulfed Japan (1945)

Hungry Russian women kneel before American Relief Administration officials (1922)

This combination of pictures shows Independence Square in Kiev on April 22, 2009 and the same square pictured on February 20, 2014

Teresa, a child in a residence for disturbed children, grew up in a concentration camp. She drew a picture of “home” on the blackboard - Poland (1948)

Job hunting in 1930s - a period marked by the Great Depression

A second before the Japanese Socialist Party leader Asanuma was murdered by an opponent student

Wedding picture from Izu Island; the habitants use gas masks because there are high levels of sulfur in the air due to volcanic activity

Archduke Franz Ferdinand with his wife on the day they were assassinated, an event that helped spark World War I (1914)

The execution of Polish men on Bloody Sunday - Bydgoszcz, (1939)

Soviet soldiers stand dumfounded at a large pile of human ashes found at the Majdanek concentration camp in 1944.

You hate your life while some people dream of having your life.