bakr al baghdadi. but officials say the couple actually had to conduct an online search that very morning, who is the leader of isis? >> maybe they didn't truly know who it was. who died in a fierce gun battle with police, after killing so many. >> just incredible that that was a year ago tomorrow. brian here with us tonight. you're learning that they had more terror planned that day. >> that's right, david, according to authorities they left behind three pipe bombs in that conference room and before they were stopped by police, they were circling the neighborhood for hours trying to remotely detonate those bombs and take more lives. >>> still much more ahead on "world news togh thursday. emergency rescue playing out. the sudden health scare for american great buzz aldrin. the medical emergency at the south pole. >>> the manhunt for a bombing suspect. new surveillance images revealed at this hour. the package exploding inside a home. what the victim is telling police tonight. >>> the abc news exclusive

bakr al-baghdadi. but officials say the couple actually had to conduct an who it was. >> reporter: two lone wolves, who died in a fierce gun battle with police, after killing so many. >> just incredible that was a year ago tomorrow. brian here with us tonight. they had more terror planned that day. >> that's right, david, according to authorities they left behind three pipe bombs in that conference room and before they were stopped by police, they were circling the neighborhood to >>> still much more ahead on "world news tonight" this evening. the health alert for buzz aldrin. >>> the manhunt for a bombing suspect. new surveillance images revealed tonight. >>> the abc news exclusive that husband of the missing mother speaking out and what he now says happened moments after the vehicle, changed and beaten and how she got help. >>> prince harry and rihanna, what they did today with the world watching and the message coaching means making tough choices. jim! you're in! but when you have high blood pressur