An Iranian woman walking past an anti-US mural painted on the wall of the former US Embassy in Tehran. Thomson Reuters Some security experts warn that the biggest threat to US security might not be one that gets the most attention. Counterterrorism officials and the public are on high alert from terrorism threats, but a from the conservative Heritage Foundation warned that Iran 'represents by far the most significant security challenge to the United States, its allies, and its interests in the greater Middle East.' Iran might not be as much of a short-term threat to US domestic security as terrorist groups like ISIS and Al Qaeda.

But its potential for developing a nuclear weapon once its deal with the US expires makes it a significant long-term threat. The deal the Obama administration struck with Iran limits the country's capacity for developing a nuclear weapon in exchange for sanctions relief, but after 10 years the Shia Islamic theocracy could start ramping up its nuclear program. Ryan Adams Blackhole Rar File. 'They're very patient and they're very strategic,' Michael Pregent, an adjunct fellow at the Hudson Institute and former US Army intelligence officer in Iraq who opposes the Iran deal, told Business Insider. Download Free 365 Casio Manual Pcrush more. 'For us, 15 years seems like a long time, for them it doesn't They'll be able to weaponize in 15 years. And then they'll be the dominant force in the Middle East.' A fellow for the Washington Institute for Near East Policy expressed similar concerns earlier this year.

'While Iran's nuclear weapons capability will grow, the tools available to the United States to counter and contain it will be diminished,' Michael Singh, a former senior director for Middle East affairs at the National Security Council, wrote in January. 'Iran's growing nuclear activities and its remaining nuclear infrastructure will have been granted legitimacy by the international community, its defensive and offensive military capabilities will be greater, and the United States will have agreed not only to refrain from imposing additional sanctions on Iran for nuclear advances but will also have suspended its most significant sanctions.' And if the US wants to keep the deal from falling apart, the government might be reluctant to rebuke Iran for its activities outside the country. Increasing sanctions could 'kill the deal, and that's why the administration is so against enforcing anything, even UN Security Council resolutions,' Pregent said.