The Director of U.S. National Intelligence says although Al-Qaeda’s capabilities have degraded since the death of its leader Osama bin Laden, the militant group will seek “to execute smaller, simpler plots to demonstrate relevance to the global jihad.”

Director James Clapper made the assessment in a report submitted to the U.S. Senate Select Committee on Intelligence on Tuesday.

On Iran, Clapper said the U.S. believes the Middle Eastern nation is keeping open the option to develop nuclear weapons, and the U.S. does not know if Iran will eventually build them.

Clapper then stressed that Iran is expanding its uranium enrichment capabilities, which can be used for either civilian or military purposes.