Washington, Jan 10: The Donald Trump administration is planning to develop a smaller low-yield nuclear weapon that can be mounted on US Trident missiles, a formal official who was privy to the draft of a policy review, revealed. The government also seeks to loosen the constraints on nuclear usage. Also Read - Planes Fly with 'Worst President Ever' and 'Pathetic Loser' Banner over Donald Trump's Home

Special assistant to Barack Obama on arms control and nuclear nonproliferation, Jon Wolfsthal said the new nuclear policy review was prepared by the Pentagon, which entails modification of Trident D5 submarine-launched missiles. The nuclear modification would be done to deter Russia from using tactical weapons. Also Read - Twitter Suspends Account of Iranian Leader Ayatollah Ali Khamenei For Tweet Against Trump

The policy review will also increase the scenarios when the administration can use a nuclear weapon– the expansion includes response to a non-nuclear attack that caused mass causalities. A nuclear attack would also be authorised if an attack is made on critical infrastructure or nuclear command and control sites. The nuclear policy review could be made public in January end, The Guardian reported. Also Read - President Biden Gets Rid of Trump's Diet Coke Button From White House Desk, Twitter is Thoroughly Amused

Wolfsthal said that he believed that the review he saw was the final draft, and it stated that the US would start work on sea-launched nuclear missile to counter the alleged Russian bid to develop a ground-launched cruise missile.

He said that the was told by the people who wrote the policy draft that they were sending out a deterrent message to the  Russians, the North Korean and the Chinese. He said that to make that credible, the United States needed to develop two new types of nuclear warheads. He said it was unwarranted as the country already had low-yield weapons like gravity bombs and air-launched cruise missiles.

However, he said the idea was dumb as firing a weapon would give away submarine’s position.

“We spend $5bn per submarine to make it invisible and we put a lot of warheads on each submarine and so what they want to do is take one missile, put one small warhead on it and launch it first, so the submarine is vulnerable to Russian attack.” Wolfsthal said. “That strikes me as being unsustainable from a naval strategy point of view,” The Guardian quoted him as saying.