Criminal justice reforms, Obamacare, the killing of Osama bin Laden and same sex marriage, but Obama's legacy appears uncertain.
Now in its sixth year, the prestigious competition attracts the most compelling imagery in landscape, wildlife, nature, travel and adventure from around the planet.
Organisers defend themselves against animal rights protesters over feast day of St Anthony, patron saint of domesticated animals.
World-renowned British photographer has been named recipient of the World Photography Organisation's Outstanding Contribution to Photography accolade.
The day marks the end of the winter solstice and the monsoon, as well as the start of the harvest season.
It is a great honour for camel owners to have their animal enter the Selcuk Camel Wrestling Festival, and they will spend all year preparing.
The cargo plane crashed as it tried to land in dense fog, killing people in a residential area near the airport as well as those on the plane.
The images will go on display at the The Bronx Documentary Center as part of a group exhibition involving 37 photojournalists.
Democratic US President Barack Obama is preparing to leave the White House on 20 January, after eight years in office.
Over the past week alone, a series of of powerful storms dumped 20 inches (50cm) of precipitation on some areas.
IBTimesUK presents some of the photo highlights from the 25th annual Parkes Elvis Festival.
Storm chaser Mike Olbinski captures lightning, tornadoes and dramatic cloud formations in stunning images that convey the awesome power and beauty of nature.
Cyprus was divided in a Turkish invasion in 1974 prompted by a brief coup engineered by the military then ruling Greece.
The blizzard conditions that have caused travel misery and power cuts in northern Britain are moving slowly southwards.
Collection at London gallery captures the photographer's irony and humour.
The hall, which sits atop 362 bags of feathers for sound insulation, has been praised for its impressive acoustics.
'Extreme climatic conditions' have plagued this year's Dakar Rally, which runs for nearly 9,000km through three countries – Paraguay, Argentina and Bolivia.
This cold snap has now been blamed for at least 69 deaths, with homeless people and migrants among those most at risk.
As it is 14 metres under the surface of the water, the museum is accessible only to scuba divers and snorkelers.
The best photos of US President Barack Obama, First Lady Michelle and daughters Malia and Sasha during their time in the White House:
In the eight years since his inauguration, Souza has taken around two million photos of Obama, capturing both historic occasions and intimate behind-the-scenes moments.
The Mexican government hiked the price of gasoline by 14 to 20 per cent on 1 January, sparking outrage among civilians throughout the country.
Extreme conditions have hit areas of southern Europe more used to mild winters.
La Vijanera festival marks the beginning of longer days following the winter solstice, although it's origins remain unknown.
Bemused commuters didn't know where to look as passengers stripped down to their underwear for the annual No Trousers On The Tube Day.
The icon, referred to as The Black Nazarene, is thought to have healing powers.
IBTimesUK presents some of best moments of the stars of TV and film who attended the event.
Parts of Europe have been hit by bitterly cold temperatures and blizzards, with temperatures as low as minus 25 degrees Celsius.
Photographers are following the action, taking spectacular photos in very challenging conditions.
Epiphany, also known as Three King's Day, falls on the 12th day after Christmas.