A year later, Iran nuclear deal is holding but fragile

Iran's ballistic missiles are threatening American allies in the Middle East.

The pact outlined what Tehran had to do to pull back its nuclear program from the brink of weapons-making capacity.

If Iran were to race now toward an atomic weapon, the Obama administration and most independent experts say it would need at least a year.

In the presidential campaign, discussion about the Iran deal focuses largely on the implications of the agreement and today's limited U.S.-Iranian cooperation, no longer on whether to attack Iran.

June's Boeing announcement, involving dozens of planes and worth as much as $25 billion, could open the floodgates — if it survives challenges from many of the same Republican and Democratic critics who opposed last year's nuclear deal.

Obama's Iran outreach is "a textbook example of the failure of appeasement," House Speaker Paul Ryan, R-Wis., wrote in a 23-page national security agenda published last month.

Iranian ballistic missiles would be more worrisome if carrying nuclear warheads, the argument goes.

"Measured by whether the agreement has prevented Iran from developing or obtaining a nuclear weapon, this deal has so far been successful," said Sen. Chris Coons, a fence-sitting Democrat a year ago who ultimately backed the accord.