WASHINGTON (AP) — Al-Qaida has decentralized, yet it’s unclear whether the terrorist network is weaker and less likely to launch a Sept. 11-style attack against the United States, as President Barack Obama says, or remains potent despite the deaths of several leaders.

Obama said in his foreign policy speech last week that the prime threat comes not from al-Qaida’s core leadership, but from affiliates and extremists with their sights trained on targets in the Middle East and Africa, where they are based. This lessens the possibility of large-scale 9/11-type attacks against America, the president said.