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By Reuters -

First Special Service Force veterans Eugene Gutierrez (L) and Charles Mann (R), of Canada, smile after receiving the Congressional Gold Medal during a ceremony honoring them and their fellow members of the First Special Service Force at the U.S. Capitol in Washington February 3, 2015. The "Devil's Brigade" special operations unit was comprised of 1,800 soldiers from the United States and Canada during World War Two. REUTERS/Jonathan Ernst

People look at a picture of slain Salvadoran Archbishop Oscar Romero at the national cathedral in San Salvador, El Salvador February 3, 2015. Pope Francis ruled that Romero, who was murdered by a right-wing death squad in 1980 and is an icon of the Roman Catholic Church in Latin America, had died as a martyr and will be beatified, the Vatican said. REUTERS/Jose Cabezas

An artificially triggered avalanche thunders down a mountain side at the Vallee de la Sionne in Anzere near Sion, Switzerland, February 3, 2015. The full-scale avalanche dynamics test site is providing scientists and engineers of the Swiss Institute of Research of Snow and Avalanches with essential data to understand and model avalanche motion, according to the Institute website. REUTERS/Denis Balibouse

Believers dressed as "diablos" (devils), enter a church to attend a face-washing ceremony of the statue of their village's patron saint San Blas (Saint Blaise) in Almonacid del Marquesado, central Spain, during the "Endiablada" festival, February 2, 2015. REUTERS/Susana Vera

Musicians rest on the grass during a celebration 40 days after the birth of Jesus, in Xochimilco on the outskirts of Mexico City, February 2, 2015. Mexicans traditionally attend mass on this day and celebrate the Feast of Candelaria, carrying elaborate effigies of the young Jesus to be blessed 40 days after Christmas. REUTERS/Edgard Garrido

A woman holds onto her hat against the wind during a snow storm in Boston, Massachusetts, February 2, 2015. REUTERS/Dominick Reuter

Employees adjust an electronic transparent screen, which shows social advertising on the front of a building, as it snows in central Moscow, February 3, 2015. REUTERS/Sergei Karpukhin

Former IMF head Dominique Strauss-Kahn rides in the backseat of a car as he leaves after the first day of trial in the so-called Carlton Affair, in Lille, France, where 14 people including Strauss-Kahn stand accused of sex offences including the alleged procuring of prostitutes, February 2, 2015. REUTERS/Gonzalo Fuentes

Jordanians hold up a poster of pilot Muath al-Kasaesbeh, who is being held captive by Islamic State militants, during a candlelit vigil in a show of solidarity with Japan, in front of the Japanese embassy in Amman, February 2, 2015. Jordanians on Monday staged a candlelit vigil outside the Japanese embassy in a tribute of solidarity with Japan and the family of Japanese journalist Kenji Goto, who was killed by the Islamic State, and to hold out hope for Jordanian pilot Kasaesbeh. REUTERS/Muhammad Hamed

Hindu devotees climb the steps to Batu Caves temple during Thaipusam in Kuala Lumpur, Malaysia, February 3, 2015. Hindu devotees across Malaysia on Tuesday celebrated Thaipusam, a religious celebration dedicated to the Hindu deity Lord Murugan. Piercing various parts of their body with silver skewers, devotees carry often large contraptions known as Kavadi, thereby taking on a physical burden through which the devotees implore for help from Murugan. Devotees also fulfill vows by carrying milk-filled pots up the stairs to the cave temple. REUTERS/Olivia Harris

A man walks past an ice-covered tree along Lake Michigan in Chicago, February 2, 2015. REUTERS/Jim Young

Migrating starlings fly in formation across the sky near the southern Israeli town of Rahat, February 2, 2015. The phenomenon known murmuration is most common during the winter months. REUTERS/Nir Elias

An Afghan refugee woman, clad in a burqa, sits with her sleeping boy as they wait with others to be repatriated to Afghanistan, at the United Nations High Commissioner for Refugees office on the outskirts of Peshawar, Pakistan, February 2, 2015. REUTERS/Fayaz Aziz

An Afghan refugee woman, clad in a burqa, waits with others to be repatriated to Afghanistan, at the United Nations High Commissioner for Refugees office on the outskirts of Peshawar, February 2, 2015. REUTERS/Fayaz Aziz

People react during a funeral ceremony for Ruslan Boburov and Vadym Zherebylo, members of self-defence battalion "Aydar", who were killed in the fighting in Luhansk region in eastern Ukraine, at Independence Square in central Kiev, February 2, 2015. REUTERS/Valentyn Ogirenko