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Photos of the week
By Reuters -

Sikh twins sleep during the Baisakhi festival at Panja Sahib shrine in Hassan Abdel April 13, 2015. Hundreds of Indian Sikh pilgrims arrived into Pakistan to celebrate the Baisakhi festival with Pakistani Sikhs at the shrines of Panja Sahib and Nankana Sahib, the birth place of Sikh faith founder Guru Nanak Dev. REUTERS/Caren Firouz

A man wearing a shirt for the foundation for Boston Marathon bombing victim Martin Richard pauses at the site of the second bomb blast on the second anniversary of the Boston Marathon bombings in Boston, Massachusetts April 15, 2015. REUTERS/Brian Snyder

A woman in costume checks her phone at the Star Wars Celebration convention in Anaheim, California, April 16, 2015. The Star Wars Celebration runs through April 19 at the Anaheim Convention Center. REUTERS/David McNew

A visitor takes a picture of the 3D printed shoes by architect Zaha Hadid during Milan Design Week, April 16, 2015. Milan Design Week will be held until April 19. REUTERS/Stefano Rellandini

Russian President Vladimir Putin takes part in a live broadcast nationwide call-in in Moscow April 16, 2015. Russia will not impose penalties against France over its failure to fulfill a 1.2 billion euro contract to supply two Mistral helicopter carriers, Putin said on Thursday. REUTERS/Alexei Druzhinin/RIA Novosti/Kremlin

Motorists stand still beside vehicles as a two-minute siren marking Holocaust Remembrance Day is sounded in Jerusalem, April 16, 2015. REUTERS/Baz Ratner

Fans cheer at the kick-off event of the Star Wars Celebration convention. REUTERS/David McNew

A visitor looks at a creation at the Artemide space during Milan Design Week, April 14, 2015. REUTERS/Stefano Rellandini

Russian President Vladimir Putin (3rd R, front) poses for a picture with call center employees after a live broadcast nationwide call-in in Moscow April 16, 2015.REUTERS/Mikhail Klimentyev/RIA Novosti/Kremlin

Redesigned stormtroopers appear onstage. REUTERS/David McNew

Mexican architect Fernando Romero's 3D printed shoes are seen during Milan Design Week, April 16, 2015. REUTERS/Stefano Rellandini

A tractor collects golf balls on a driving range in the Palm Springs area, California April 13, 2015. The average daily water usage per person in Palm Springs is 201 gallons, more than double the California average. California's cities and towns would be required to cut their water usage by up to 35 percent or face steep fines under proposed new rules, the state's first-ever mandatory cutbacks in urban water use as the state enters its fourth year of severe drought. Communities where residential customers use more than 165 gallons of water per person per day would have to cut back by 35 percent. REUTERS/Lucy Nicholson

A woman has the words "Boston Stronger" written on her arm near the finish line. REUTERS/Brian Snyder

A lights installation is seen at the Carlesso space during the Milan Design Week, April 14, 2015. REUTERS/Stefano Rellandini

A demonstrator dressed as Brazil's President Dilma Rousseff takes part during a protest against Rousseff in Brasilia April 12, 2015. REUTERS/Ueslei Marcelino

A robot in the Robotic Kitchen prototype created by Moley Robotics cooks a crab soup at the company's booth at the world's largest industrial technology fair, the Hannover Messe, in Hanover, Germany, April 13, 2015. REUTERS/Wolfgang Rattay

A woman places a flower beside the name of a former concentration camp during a ceremony entitled "Unto Every Person There is a Name" at Yad Vashem Holocaust memorial in Jerusalem, April 16, 2015. REUTERS/Baz Ratner

A visitor walks in front of a creation by iDOGI during the Milan Design Week, April 14, 2015. REUTERS/Stefano Rellandini

Victoria's Secret model Alessandra Ambrosio of Brazil (C) walks through the Coachella Valley Music and Arts Festival with friends, in Indio, California April 12, 2015. REUTERS/Lucy Nicholson

A scale model of a dinosaur (L) and a shadow of another (R) are seen displayed in front of La Sapienza University headquarter in Rome April 10, 2015. The realistic reproductions of dinosaurs are part of the "Dinosaurs in the flesh, science and art bring to life the rulers of a lost world" exhibition. REUTERS/Alessandro Bianchi

A combination of pictures shows the Boeoegg, a snowman made of wadding and filled with firecrackers, burning atop a bonfire in the Sechselaeuten square in Zurich April 13, 2015. As the bells of St. Peter's church chime six o'clock, the bonfire below the "Boeoegg" is set alight and mounted guildsmen gallop around the pyre to the tune of the Sechselaeuten March. The faster the head of the "Boeoegg", the symbol of winter, catches fire and explodes, the warmer and more beautiful the summer will be. REUTERS/Arnd Wiegmann

Israeli Prime Minister Benjamin Netanyahu (C) and his wife Sara (R) attend the Mimona ceremony at the Israeli town of Or Akiva near Caesarea April 11, 2015. Mimona is traditionally celebrated by Jews from North Africa at the end of the Passover holidays. REUTERS/Amir Cohen

A woman participates in a vigil for the girls who were abducted from a secondary school in Chibok, on the anniversary of their abduction in Abuja April 14, 2015. Nigeria's President-elect Muhammadu Buhari vowed to make every effort to free more than 200 schoolgirls abducted by Boko Haram militants a year ago but admitted it was not clear whether they would ever be found. REUTERS/Afolabi Sotunde