KUSA - North Korea has tested its most powerful nuclear weapon yet, and responding effectively will be a challenge for the international community.
The United States, France and Britain are calling for new sanctions against North Korea for again defying U.N. Security Council resolutions and carrying out a fifth nuclear test.
Friday's underground test was so powerful it triggered an earthquake.
North Korea says the test proves it can now put a nuclear warhead on a missile.
The North’s claims raise concerns that this is another step toward an attack along America’s West Coast.
Years of tough sanctions have not done much to deter North Korean leader Kim Jong Un's nuclear ambitions.
Ambassador Christopher Hill was America's top diplomat during the six-party talks to resolve the North Korean nuclear crisis of 2005.
He is now Dean of the Josef Korbel School of International Studies at the University of Denver.
"Well I'm certainly in favor of any and all sanctions,” Hill said. “But I think that we need to understand that the North Koreans seem to have internalized those, and they don't seem to care anymore. So, we probably have to look to see whether there are some options that together with the Chinese could be taken of a quiet variety, perhaps even a clandestine variety, that could somehow slow down this nuclear program, because what is very clear is the North Koreans are going to go at this until they succeed."
Donald Trump and Hillary Clinton have been sparring over who is better fit to respond to North Korea.
Clinton says the current crisis shows the need for America to elect a president who confronts threats with steadiness and strength.
The Trump campaign says the North's nuclear test is another example of Clinton's catastrophic failures when she was Secretary of State.
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