Two Years Have Passed Since Chibok Girls Kidnapped

A woman attends a demonstration calling on the government to increase efforts to rescue the 276 missing kidnapped school girls of a government secondary school Chibok, in Lagos, Nigeria, May 5, 2014.

In this Monday, May 26, 2014, photo, the Nigerians United Against Terrorism group attends a demonstration calling on the government to rescue the kidnapped girls of the government secondary school in Chibok, in Abuja, Nigeria.

People hold candles during a vigil to mark the one year anniversary of the abduction of girls studying at the Chibok government secondary school, Abuja, April 14, 2015.

Young girls known as Chibok Ambassadors, carry placards bearing the names of the girls kidnapped from the government secondary school in Chibok, a year ago, during a demonstration, in Abuja, April 14, 2015.

The White House posts a Twitter photo showing First Lady Michelle Obama holding a sign with hashtag #BringBackOurGirls, May 7, 2014.

People attend a demonstration calling on the government to rescue the kidnapped school girls from the Chibok government secondary school, outside the defense headquarters in Abuja, May 6, 2014.

An event held April 12, 2015 in Washington, during which protestors demanded the release of 276 schoolgirls abducted a year earlier in Chibok.

An event held in Washington on April 12, 2015 for the release of the schoolgirls abducted a year earlier in Chibok.

Goodluck Jonathan, then-president of Nigeria, greets parents of girls kidnapped in Chibok, in Abuja, July 22, 2014.