Nikki Haley, the US Ambassador to the United Nations, will present "irrefutable evidence" that Iran has violated the Iran deal, according to her office.
World powers that joined the USA in brokering that deal have voiced frustration at Mr. Trump's moves to "decertify" Iran's compliance with the deal as a prelude to renegotiating it.
An advisory issued ahead of Haley's remarks said she would give "irrefutable evidence" that Iran has not lived up to its worldwide obligations and has tried to cover up its actions.
Even so, Haley's presentation was roundly cheered by Iran's enemies, including Israel, the United Arab Emirates, and Saudi Arabia. "The fight against Iranian aggression is the world's fight".
"Following a series of baseless accusations against the Islamic Republic of Iran in the past 10 months, the U.S. Ambassador to the United Nations once again today took the same line accusing the Iranian government of supplying the missile that hit Saudi Arabia on November 4th - an accusation that we categorically reject as unfounded and, at the same time, irresponsible, provocative and destructive", Iran said.
This in itself does not necessarily contravene the deal, however, as the agreement does not explicitly forbid ballistic missile production or distributing arms.
Guterres' report also raises the possibility that Iran may be violating a provision of its 2015 nuclear agreement with world powers calling on it not to develop ballistic missiles capable of carrying nuclear warheads, AP reported. "The evidence is undeniable - they might as well have had "Made in Iran" stickers all over them". "Just imagine if this missile had been launched at Dulles Airport or JFK", Haley said, naming Washington-area and NY airports, "or the airports in Paris, London or Berlin".
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But the evidence she showcased - four weapons provided to the US government by Saudi Arabia and the United Arab Emirates - fell short of proving her claims.
"This evidence demonstrates a pattern of behavior in which Iran sows conflict and extremism", Haley said, flanked by an array of mangled missile parts, a broken-up drone and other weaponry recovered by Persian Gulf allies of the United States.
The crisis has deteriorated under Saudi Arabia's month-long blockade of desperately needed aid supplies in Yemen, where almost 70 percent of the population depends on foreign aid to survive. The Obama-era deal rolled back Iran's nuclear program in exchange for billions in sanctions relief, but did not address Iran's missile-building or support for militant groups in the Middle East.
The number of ballistic missiles deployed by Iran's proxies is rising at an unprecedented level.
The Pentagon cited corporate logos of Iranian defense firms on jet vanes that help steer the missile's engine and on the circuit board helping drive its guidance system.
The equipment in the hangar is proof of Iran's malicious strategy, Seal said. Spencer Ackerman, national security reporter for the Daily Beast, wrote: "Wonder when Iran holds its press conference to highlight all the American and British munitions the Saudis have used on hospitals, the Sanaa airport, etc". The exact nature and extent of the assistance are unclear, but what is publicly acknowledged includes USA provision of targeting information and refueling of Saudi warplanes. At least 14,000 people have been killed or wounded since the Saudi-led offensive against the Houthis in neighboring Yemen began in March 2015.
Haley has called on the UN Security Council to take a tougher stance toward Iran, accusing Tehran of making illegal arms deals in Yemen, Lebanon and Syria.
While the official Saudi and USA account claimed that the incoming projectile was stopped by the US -built Patriot Advanced Capability-3 missile defense system, an expert investigation later suggested the missile struck the ground, missing the city's worldwide airport by about half a mile.