The United States sends fighter planes , satellite images to help search . All options are on the table to gain release of abducted girls , official says . The comments come after Boko Haram leader claims to show some of the girls . In separate shots filmed against a green backdrop , the man who claims to be Shekau says the girls -- who come from a Christian stronghold -- have converted to Islam . Official thought to be a Haram leader says he will exchange the girls for prisoners .
The United States sends fighter planes , satellite images to help search . All options are on the table to gain release of abducted girls , official says . The comments come after Boko Haram leader claims to show some of the girls . Official thought to be a Haram leader says he will exchange the girls for prisoners .