May 13, 2014 6:54 PM by Rob Quirk
U.S. reconnaissance aircraft have been flying over Nigeria in the search for nearly 300 kidnapped schoolgirls.
The flights come a day after the Boko Haram militant group released video evidence that at least some of the girls are still alive and demanded that jailed fighters be swapped for their freedom.
Nigerian authorities have verified the footage as authentic, saying 54 of the girls have been identified by relatives, teachers and classmates who have seen the video.
A Nigerian government official says "all options" are open in the effort to free the girls.
Protesters marched through the streets of the capital, Abuja, today, demanding more government action to find and free the girls. They are believed to be held in the vast Sambisi forest some 20 miles from the eastern town of Chibok, where they were seized from their school a month ago.