The abduction of almost 300 high-school girls from their dormitories in northern Nigeria more than a month ago went largely unnoticed by the Western press until a social media campaign using the hashtag #BringBackOurGirls brought it to the forefront of American political discussion. The hashtag has now been tweeted millions of times, mobilizing some to action, and the U.S. government has pledged 200 troops and $7 million to rescuing the girls. Is this another example of the power of social media to affect change?