U.S. Energy Secretary Chris Wright said he expects U.S. nuclear-weapons testing sought by President Donald Trump to stop short of actual atomic bomb explosions for now.

“I think the tests we’re talking about right now are system tests,” Wright said on Fox News’ “The Sunday Briefing.” “These are not nuclear explosions. These are what we call noncritical explosions.”

Such tests involve “all the other parts of a nuclear weapon to make sure they deliver the appropriate geometry and they set up the nuclear explosion,” he said.

Trump said last week that he’s instructing the Pentagon to start testing U.S. nuclear weapons “on an equal basis” in response to “other countries’ testing programs.” Russia has recently announced trials of a nuclear-powered underwater drone and nuclear-capable cruise m

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