The United States and other Western countries have closed embassies throughout the Middle East and North Africa due to reports of terror plots.
"What I said [in a May speech] is that core al-Qaida is on its heels and has been decimated," Obama told reporters at the White House, "but what I also said was that al-Qaida has metastasized" into smaller groups.
"They [still] have the capacity to go after our interests," Obama said.
By "core al-Qaida," Obama said, he was referring to the tightly organized group that organized the Sept. 11, 2001, terror attacks.
Sign language interpreter at Mandela service called out as fake on Twitter
Puzzle-maker slips 'Murdoch Is Evil' into Rupert Murdoch's Sunday Telegraph