President Donald Trump reiterated his call for the U.S. to resume nuclear testing in a video he posted on his social media platform Truth Social. "Because of other countries' testing programs, I have instructed the Department of War to start testing our nuclear weapons on an equal basis," President Trump said in the video. In late October, as he prepared to meet with Chinese President Xi Jinpeng, President Trump made a similar post on Truth Social. "We have more nuclear weapons than anybody. We don't do testing. We halted it many years ago," President Trump told reporters on Air Force 1. Secretary of Energy Chris Wright said the testing likely won't include full-scale detonations — but test the components of the U.S.'s nuclear weapons. "We understand the physics actually at the last moment of the implosion," Wright said. Instead, he said the Department of Energy would conduct tests to make sure the weapons work reliably as scientists try to modernize the U.S.'s nuclear arsenal. "There's all different kinds of testing. And, of course, we're discussing all different other ideas for testing," Wright said. In 1996, the U.S. signed on to the Comprehensive Nuclear Test Ban Treaty. Congress never ratified it, but every presidential administration since has abided by the treaty. Most countries with nuclear weapons have, too. The U.N. said North Korea last tested nuclear weapons in 2017. China and the Soviet Union/Russia both stopped in the 90s, according to the U.N. Last week, Russian President Vladimir Putin ordered his government to submit plans to resume nuclear testing in response to President Trump's statements. When asked whether he has been involved in discussions about full-scale nuclear detonation testing in the U.S., Secretary Wright said "I won't get into any details here." Secretary Wright said he's committed to making sure the U.S. increases its nuclear capability. "We need to be meaningfully stronger than our adversaries," Wright said. "That's how you keep peace." North Korea is the only country to conduct full-scale tests of nuclear weapons in this century, according to the U.N.