Men ride a motorcycle and sidecar along a road near Reinosa, northern Spain on Friday. Spain's weather authorities have put out alerts of cold temperatures and snowstorms for several regions in the country. Nacho Cubero/Reuters
An army cadet looks through the barrel of a cannon during a reunion carnival of the Electronics and Mechanical Engineers corps in the southern Indian city of Hyderabad on Friday. The carnival will be open for the general public from January 9-15. Krishnendu Halder/Reuters
Indian ballboys wring out a towel as they attempt to sop up rainwater from the surface of the court at The ATP Chennai Open 2010 tennis tournament in Chennai on Jan. 8. Rain has delayed the quarter-final matches of the competition in the eastern Indian city. Dibyangshu Sarkar/AFP/Newscom
A Nanga Sadhu, or Hindu holy man puts sacred ash on a pilgrim's forehead at a transit camp on the way to Gangasagar, in Calcutta, India, on Friday. Pilgrims have started arriving in the city to bathe at the confluence of River Ganges and Bay of Bengal at Sagar island, on the auspicious Indian holiday of Makar Sankranti, Jan. 14. Bikas Das/AP
A Palestinian tries to throw a tear gas grenade back at Israeli troops during scuffles between Palestinians and Jewish settlers near the West Bank settlement of Halamish on Friday. An Israeli army spokesperson said that forces arrived in the area on Friday to separate angry Palestinians and settlers who were throwing stones at each other. Baz Ratner/Reuters
The PS20 solar plant at 'Solucar' solar park in Sanlucar La Mayor, near Seville, Spain is seen on Friday. The solar thermal power plant uses mirrors to concentrate the sun's rays onto towers where they produce steam to drive a turbine, producing electricity. Marcelo del Pozo/Reuters
Mellisa Hollingsworth of Canada reacts after winning the women's skeleton race during the Bobsleigh and Skeleton World Cup competition in the Bavarian resort of Schoenau am Koenigssee on Friday. Hollingsworth won ahead of Germany's Kerstin Szymkowiak and Britain's Shelley Rudman. Michaela Rehle/Reuters
A priest attends the farewell ceremony for Peruvian soldiers departing for their mission in Haiti, at the General Army headquarters in Lima on Friday. More than 200 Peruvian soldiers of the United Nations Stabilization Mission in Haiti will help in security operations in the Caribbean country. Pilar Olivares/Reuters
Bare-backed fire-fighting soldiers participate in cold-resistance training in snow on Jan. 7 in Changchun, Jilin province of China. Shi Zhongwei/ChinaFotoPress/Newscom
Elvis Presley fan Lori Vigil, of Denver, poses in an Elvis costume as she attends festivities commemorating Presley's 75th birthday on Friday in Memphis, Tenn. Mark Humphrey/AP
Alexandre Curado holds a rainbow flag in front of the Portuguese Parliament after the house on Friday passed the Socialist government's bill to legalize same-sex marriages, in Lisbon. Nacho Doce/Reuters
An award-winning director discusses the challenges of making a documentary about a top secret digital weapon. Officials from both countries believed to be responsible for the virus meant to slow Iran's nuclear program won't publicly acknowledge it ever existed.
In his recently released film "Zero Days," award-winning documentary filmmaker Alex Gibney takes on an especially tough challenge: Making a movie about a top secret program that few people will publicly acknowledge ever existed.