The Wall Street Journal | Laurence Norman: Argentine diplomat Rafael Grossi was strongly supported by U.S.

The United Nations� atomic agency�s board picked a new leader Tuesday with strong U.S. backing who has pledged to shake up the body and strictly monitor Iran�s nuclear activities.

Argentine diplomat Rafael Grossi, 58 years old, is likely to be formally elected when he receives the backing of the International Atomic Energy Agency�s full membership, which is expected in the next few weeks.

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