WASHINGTON — Nearly 50 people marched Saturday from Federal Triangle to Capitol Hill to commemorate the 276 Nigerian schoolgirls who were kidnapped by Boko Haram on April 14, 2014. So far the Nigerian government still has not found the girls. The one-year anniversary is a global event. About 25 marches will take place in 10 countries, including Nigeria, Belgium, Norway and United Kingdom, to call for international attention and persistent rescue efforts, according to the website of Bring Back Our Girls, a volunteer team that collected information about the marches.