Abbas Araghchi, Iran's deputy foreign minister, said progress was made at talks in Vienna aimed at saving the nuclear deal but probably not enough to convince Tehran to change its decision to go over the deal's core atomic restrictions one by one.
US President Donald Trump's has tightened economic sanctions against Iran and his administration says it has built up the US military presence in the region. Tehran has described the US moves as "psychological warfare" and a "political game."
The current standoff between the US and Iran represents the symbiosis of hard military assets and cyber escalation.
Houthi rebels claim drone attacks a response to Saudi "crimes" in Yemen. The assaults are the latest in a series of security challenges faced by the Middle East, following the alleged sabotage of oil tankers off UAE coast.
US sends amphibious assault ship and a Patriot missile system to Middle East to counter alleged threats from Iran, despite Tehran shrugging off recent US deployment in the region.
Contrary to what the nuclear deal's critics say, it was a stabilising force in the region and the Middle East needs it.
Donald Trump's administration is pushing Iran to the edge but the administration might not understand exactly what that entails.
USS Carl Vinson's arrival marks biggest US military presence since 1975 and comes at a time China seeks to expand influence in South China Sea.
Turkish President Erdogan talked on Monday about the future of Turkish defence industry and the aim to make the country self-sufficient in 2023.
The US is sending an aircraft carrier group to the Asia-Pacific as tensions grow in the region, with speculation that North Korea is preparing to carry out a nuclear test.
The successful completion of the Ryomyong Street residential complex is "scarier than the explosion of hundreds of nuclear bombs," said North Korea's premier Pak Pong-yu.
Russia said it had begun a "major operation" which saw the first bombardments carried out by warplanes taking off from its aircraft carrier.
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