Asked if more sanctions would just increase the desperation in Iran and create more instability in the region, McCaul replied, "I think that's what we want".
He has announced new sanctions beginning today and United States cyber forces reportedly struck Iranian military computer systems. The Islamic Revolutionary Guard Corps said the drone was shot down after it penetrated Iranian airspace in Homozgan province, Iran's state-run Press TV reported.
The trip was announced after Donald Trump said the U.S. was "cocked and loaded" to retaliate against Iran for downing an American drone.
However, the U.S. claims the drone was flying over global waters.
"Neither Iran nor any other hostile actor should mistake United States prudence and discretion for weakness", Bolton said ahead of a meeting with Israeli Prime Minister Benjamin Netanyahu in Jerusalem.
Last year, tourism authorities had announced that Iran would no longer stamp passports of tourists visiting the country in near future.
"It further undermined the already limited confidence of other Western leaders in Trump's judgment, it cast the US president as a paper tiger and provided a moment of triumph for the ayatollahs in Tehran and it raised new doubts about the rationale behind Netanyahu's drive to persuade Trump to abandon the 2015 nuclear deal", wrote Haaretz columnist Chemi Shalev. "I'm looking forward to that day". "We have to, as a nation, work in coordination with our allies to denuclearize Iran and to bring stability and peace back to that region".
"If a conflict breaks out in the region, no country would be able to manage its scope and timing", Major General Gholamali Rashid said, according to the semi-official Fars news agency.
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According to Jahromi, the fortress will also help Iran prevent denial-of-service strikes and protect the country's industrial infrastructure against cyber espionage and sabotage attacks.
"They try hard, but have not carried out a successful attack", Mr Jahromi said on Twitter.
Then Trump's national security adviser, John Bolton, stepped in on Sunday with a blunt warning from Jerusalem, where he was travelling.
On a visit to Kuwait, the US Special Representative for Iran, Mr Brian Hook, said that the Group of 20 meeting in Osaka, Japan, on Friday and Saturday would provide an opportunity to discuss addressing maritime threats in Gulf waters.
'We will consider the American proposal in a fair and open way, ' he said as he hosted Bolton. "We want them to have their economy crippled".
Foreign Office minister Andrew Murrison has warned that Iran "needs to stop" attacks in the Gulf of Oman.