As Donald Trump prepared to take office, his predecessor Barack Obama warned that North Korea would be the greatest challenge of his presidency. But rather than proceed with caution, President Trump responded to a series of intercontinental ballistic missile and nuclear weapons tests with bellicose rhetoric, warning North Korea's threats would "be met with fire and fury like the world has never seen." By the end of 2017, US fears of a conflict with North Korea that might escalate into a nuclear war had never been higher. Then in March, the White House surprised everyone, by announcing out of nowhere that Trump would hold face-to-face talks with North Korea's leader, Kim Jong-un. The high-stakes summit is slated to take place in May or June, but the outcome remains hard to predict. North Korea's isolation makes it difficult to read. And over the past year, the Trump administration's messaging toward North Korea has been as inconsistent as it has been provocative. "Past administrations didn't always get it right, and Lord knows the Obama administration made many mistakes. But we really worked hard to try to coordinate our message," says director of the Nuclear Crisis Group, Jon Wolfsthal. "Here it seems this administration, even a year in, has trouble coordinating the most basic strategy for communications. Are we open to dialogue or not? Are we prepared to negotiate or not? Are there preconditions for our discussions with North Korea or not?" Over the course of three eventful months, Fault Lines spoke with a range of Washington insiders in an effort to understand Donald Trump's North Korea strategy. They include former US government officials, policy-makers and intelligence analysts who combined have spent more than 100 years working on North Korea. The result is a portrait of an impulsive brand of leadership in which personality confounds policy, with far-reaching consequences for North Korea, US allies in East Asia, and the United States. More from Fault Lines on: YouTube - http://aje.io/faultlinesYT Facebook - https://facebook.com/AJFaultLines Twitter - https://twitter.com/AJFaultLines Website - http://aljazeera.com/faultlines/ - Subscribe to our channel: http://aje.io/AJSubscribe - Follow us on Twitter: https://twitter.com/AJEnglish - Find us on Facebook: https://www.facebook.com/aljazeera - Check our website: https://www.aljazeera.com/