DUBAI, United Arab Emirates — France, Germany and the United Kingdom started a process Thursday to reimpose United Nations sanctions on Iran over its nuclear program, further isolating Tehran after its 12-day war with Israel saw its atomic sites repeatedly bombed.

What You Need To Know

France, Germany and the United Kingdom have started a process to reimpose U.N. sanctions on Iran over its nuclear program

The mechanism, known as "snapback," could freeze Iranian assets abroad, halt arms deals, and put renewed sanctions on its ballistic missile program

It is designed to be veto-proof at the U.N. and is likely to go into effect

European nations warned Iran on August 8 that it could trigger "snapback" after Tehran halted inspections by the International Atomic Energy Agency

The mechanism

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