 A Kenyan student holds a candle and white rose as he and others march in memory of the victims of the Garissa college attack and to protest what they say is a lack of security, in downtown Nairobi, Kenya Tuesday, April 7, 2015 (Photo: AP)
 Baby chimpanzee Dayo sleeps on the belly of its mother on a warm spring Tuesday, April 7, 2015 at the zoo in Gelsenkirchen, Germany (Photo: AP)
 Strollers walk past a row of Japanese cherry blossom trees at the Schlossgarten park in Schwetzingen, Germany, Tuesday, April 7, 2015 (Photo: AP)
 Luke and Carolyn Woods of Silver Spring, Md., pose for a photographer among the cherry blossoms trees in Washington, Tuesday, April 7, 2015 (Photo: AP)
 A man takes photographs of the ancient Herodes Atticus odeon in Athens, on Tuesday, April 7, 2015 (Photo: AP)
 A tree is covered with snow on a sunny spring day in the western Austrian village of Absam April 7, 2015 (Photo: Reuters)
 Kenyan university students participate in a demonstration against an attack by gunmen at the Garissa University College campus, along the streets of the capital Nairobi, April 7, 2015 (Photo: Reuters)
 The Washington Monument and the Thomas Jefferson Memorial are visible through cherry blossoms along the Tidal Basin in Washington, Tuesday, April 7, 2015 (Photo: AP)
 Traffic moves at dusk in Mumbai, India, Tuesday, April 7, 2015 (Photo: AP)
 Luke Donald, of England, and his caddie walk over the Nelson Bridget during a practice round for the Masters golf tournament Tuesday, April 7, 2015,
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