A swimmer reacts as he prepares to swim in the Serpentine lake after snow fall in central London

Toby Melville/Reuters

A swimmer prepares to swim in the Serpentine lake after snow fall in central London on Tuesday.

Former Cuban President Fidel Castro and President of Cuba's University Students Federation Randy Perdomo look at a newspaper during a meeting in Havana

  © Reuters

Former Cuban President Fidel Castro and President of Cuba’s University Students Federation (FEU) Randy Perdomo look at a newspaper during a meeting in Havana

Mattek-Sands of the U.S. and Safarova of Czech Republic celebrate defeating Zheng of China and Chan of Taiwan to win their women's doubles final match at the Australian Open tennis tournament in Melbourne

Brandon Malone/Reuters

Bethanie Mattek-Sands (R) of the U.S. and Lucie Safarova (L) of Czech Republic celebrate defeating Zheng Jie of China and Chan Yung-Jan of Taiwan to win their women’s doubles final match at the Australian Open tennis tournament in Melbourne on Friday.

Indian Border Security Force (BSF) passing out parade

Farooq Khan/EPA

New recruits of the Indian Border Security Force (BSF) march as they take part in the passing out parade at Humhama on the outskirts of Srinagar, the summer capital of Indian Kashmir, on Friday. A total of 333 recruits were formally inducted into the BSF, an Indian paramilitary force, after completing 44 weeks of rigorous training in physical fitness, weapon handling, commando operations and counter insurgency.

A girl kisses her father, a conscript, after a ceremony marking enrolment for new conscripts in the Ukrainian army in Kiev

Gleb Garanich/Reuters

A girl kisses her father, a conscript, after a ceremony marking enrolment for new conscripts in the Ukrainian army in Kiev. Ukraine’s parliament voted January 15 to refresh its front-line forces and resume partial conscription after a top security official warned that Russian forces backing separatist rebels had sharply increased military activity in the east.

India Horse Racing

Rafiq Maqbool/AP

Handlers holds onto their horses after a training session ahead of the Indian Derby in Mumbai, India on Thursday. The Indian Derby, which will be held on Sunday, is one of India’s prestigious racing events.

Circus artists perform in front of Pope Francis during the Wednesday general audience in Paul VI hall at the Vatican

Alessandro Bianchi/Reuters

Circus artists perform in front of Pope Francis during the Wednesday general audience in Paul VI hall at the Vatican.

India's BSF soldiers ride camels as they rehearse for "Beating Retreat" ceremony in New Delhi

Ahmad Masood/Reuters

India’s Border Security Force (BSF) soldiers ride their camels as they rehearse for the “Beating Retreat” ceremony in New Delhi on Tuesday. The ceremony symbolises retreat after a day on the battlefield, and marks the official end of the Indian Republic Day celebrations.

Jerzy Janowicz of Poland reacts after defeating Gael Monfils of France in their men's singles second round match at the Australian Open 2015 tennis tournament in Melbourne

Thomas Peter/Reuters

Jerzy Janowicz of Poland drops his racquet after defeating Gael Monfils of France in the men’s singles second round match at the Australian Open 2015 tennis tournament in Melbourne

Sharapova of Russia serves to compatriot Panova during their women's singles match at the Australian Open 2015 tennis tournament in Melbourne

Carlos Barria/Reuters

Maria Sharapova of Russia serves to compatriot Alexandra Panova during the women’s singles second-round match at the Australian Open 2015 tennis tournament in Melbourne on Wednesday. Sharapova defeated Panova to win the match.

Religious figures along with Hezbollah members and supporters mourn over the coffin of Lebanon's Hezbollah commander Mohamad Issa, known as Abu Issa, during funeral in Arab-Salim

Ali Hashisho/Reuters

Religious figures along with Hezbollah members and supporters mourn over the coffin of Lebanon’s Hezbollah commander Mohamad Issa, known as Abu Issa, during his funeral in Arab-Salim, south Lebanon on Tuesday.

A suspect in a hostage taking situation is detained by members of special French RAID forces outside the post offices in Colombes outside Paris

© Reuters

A suspect in a hostage taking situation raises his arms in the air as he is detained by members of special French RAID forces outside the post offices in Colombes outside Paris.

People look on as a car balances on the edge of a caved-in area on a street in Guangzhou

  © Reuters

A car balances on a section of road that caved in in Guangzhou, Guangdong province in China. The hole, which measures approximately 25 square metres, appeared on Wednesday morning.

Activist kicks the shields of the military police officers during a demonstration in the military zone of the 27th infantry battalion in Iguala, Guerrero

Jorge Dan Lopez/Reuters

An activist kicks at military police during a demonstration in Iguala, Mexico. Activists and relatives of 43 missing trainee teachers broke into a military zone, less than a mile from where the students went missing. The remains of only one of the students has been identified so far.

A swimmer practices in the waters of Copacabana beach as the sun rises in Rio de Janeiro

Ricardo Moraes/Reuters

A swimmer practices in the waters off Copacabana beach as the sun rises in Rio de Janeiro, Brazil.

Girls carry their school bags as they walk along a road while heading to their school after it reopened in Peshawar

Khuram Parvez/Reuters

Girls carry their school bags as they walk along a road while heading to their school after it reopened in Peshawar on Monday. Children streamed back to school across Pakistan on Monday in an anxious start to a new term following last month’s massacre of 134 students at an army-run school in the volatile northwestern city of Peshawar.

People walk out of the cool waters of the Black Sea, as winter swimming fans gather on a beach on the Orthodox Christmas day in the Crimean

Pavel Rebrov/Reuters

People walk out of the cool waters of the Black Sea, as winter swimmers gather on a beach on the Orthodox Christmas day in the Crimean port of Yevpatoriya on Wednesday

A girl looks on among Afghan women lining up to receive winter relief assistance donated by the UNHCR in Kabul

Omar Sobhani/Reuters

A girl stands among Afghan women lining up to receive winter relief assistance donated by the United Nations High Commissioner for Refugees (UNHCR) in Kabul, on Wednesday

Visually impaired students of a school for the blind fight for the ball during a soccer match inside their school in New Delhi

Anindito Mukherjee/Reuters

Visually impaired students at a school for the blind take part in a football match in New Delhi, India, on Monday.

Nihangs or Sikh warriors perform "Gatkha", a traditional form of martial arts, during a religious procession ahead of the birth anniversary of Guru Gobind Singh in the northern Indian city of Chandigarh January 5, 2015. Guru Gobind Singh was the last and the tenth Guru of the Sikhs. REUTERS/Ajay Verma (INDIA - Tags: RELIGION ANNIVERSARY SOCIETY TPX IMAGES OF THE DAY)

Ajay Verma/Reuters

Nihangs, or Sikh warriors, perform a traditional form of martial arts called Gatkha, during a religious procession ahead of the birth anniversary of Guru Gobind Singh in Chandigarh, north India, on Monday.