The Guardian wrote on January 31:

"Tension between the US and Iran heightened dramatically today with the disclosure that Barack Obama is deploying a missile shield to protect American allies in the Gulf from attack by Tehran. The US is dispatching Patriot defensive missiles to four countries – Qatar, United Arab Emirates, Bahrain and Kuwait – and keeping two ships in the Gulf capable of shooting down Iranian missiles. Washington is also helping Saudi Arabia develop a force to protect its oil installations.

"American officials said the move is aimed at deterring an attack by Iran and reassuring Gulf states fearful that Tehran might react to sanctions by striking at US allies in the region... Washington is also concerned at the threat of action by Israel, which is predicting that Iran will be able to build a nuclear missile within a year, a much faster timetable than assessed by the US, and is warning that it will not let Tehran come close to completion if diplomacy fails...

"Washington is also concerned that if Iran is able to build nuclear weapons, other states in the region will feel the need to follow. Israel is the only country in the Middle East to already have atomic bombs, although it does not officially acknowledge it..."