Negotiations over denuclearization of North Korea collapsed this morning after North Korean dictator Kim Jong Un insisted the United States lift all economic sanctions in return for any nuclear disarmament.

U.S. Secretary of State Mike Pompeo said that talks with North Korea will soon resume, according to the Associated Press. However, before the Trump administration announced the lack of agreement, U.S. negotiators had already backed off the demand that Kim and his government allow access and transparency to the international community concerning their nuclear weapons program.

North Korea, like all countries with a nuclear program, is quite secretive about its research and testing. No one knows exactly how much nuclear material North Korea has or even exactly what kinds of warheads they've developed. [North Korea: A Hermit Country from Above (Photos)]

But North Korea won't necessarily have to let the entire world poke around its nuclear facilities to show that they've slowed or stopped their pursuit of nuclear arms. According to nuclear security experts, there are many ways to monitor the situation remotely — but they can provide only limited information without North Korea's cooperation.

"There is a whole panoply of technologies," said Sharon Squassoni, a professor and nuclear security expert at The George Washington University.

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