morning on "america this morning" and "good morning america." turning now to our other top story -- the search for an expectant mom has gone from a missing persons case to a murder case. 19-year-old erin corwin was reported missing by her husband, marine corporal jonathan corwin, two months ago. yesterday her body was found not far from her home at the bottom of a mine shaft. her alleged loverer, former marine, christopher brandon lee, is now in custody. investigators say it appears corwin was going out to meet lee the day she disappeared. isis fighters in iraq have suffered a rare defeat. losing control of the country's largest dam with the help of american air power. it's now back in the hands of iraqi forces. abc's karen travers has the details. >> reporter: the u.s. military launched another heavy aerial bombardment over northern iraq more than a dozen air strikes aimed at helping kurdish and iraqi forces reclaim the critical mosul dam from isis.