for braving a dangerous climate to a tent school, they were trying to take revenge on the fact these girls wanted to do better for themselves. >> reporter: the nigerian president promised the girls would be found, but promises mean little to the desperate marchers in the streets and little to quiet the wave of online support building across the globe. over the past week, the hashtag bringbackourgirls has been used more than 800,000 times, including by hillary clinton and a string of well-known names calling for action. >> if the nigerians ask, the u.s. could possibly provide intelligence, including overhead satellite imagery. the terror group is likely ç hiding out in extremely remote areas of nigeria, but the u.s. is vowing to help in any way it can. martha raddatz, abc news, washington. >> sickening story. >> by the way, the terror group is citing an ancient jihadi custom of enslaving women captured, quote, captured, in a holy war and then these women can be used as sex slaves. >> just horrible.