Satellite images that have shown some recent activity around two Iranian nuclear sites bombed last year by Israel and the U.S. suggest Iran may be trying to recover materials from the area.

Satellite images show Iran covering and rebuilding parts of Natanz, Isfahan, and Parchin as Washington weighs possible military action. In recent days, multiple satellite photo providers have published pictures of the latest Iranian efforts to conceal the status of the Islamic Republic’s efforts to rebuild its nuclear program at Natanz,

One of the surviving reactors at the Kashiwazaki-Kariwa plant was loaded with fuel last summer and recently turned back on, to mixed reactions.