One errant comment away from

President Trump responded saying any North Korean threat “will be met with fire and fury like the world has never seen.” North Korea’s responded, warning it planned to strike near Guam as soon as mid-August, and was merely waiting for Kim to give the go-ahead. Trump, however, doubled down, saying if Pyongyang threatened U.S. interests and allies “things will happen to them like they never thought possible.” He then said U.S. military solutions were “locked and loaded,” adding he hoped Kim “will find another path.”

The remarks led to concerns the two countries were one errant comment away from a conflict—possibly involving nuclear weapons. Trump has previously said that while the U.S. was open to diplomacy, two-plus decades of talks with North Korea had not persuaded the country to renounce its nuclear-weapons or missile programs. In fact, North Korea has repeatedly been found cheating on its international obligations, part of the reason why the Obama administration did not talk with the North.

What does "one errant comment away from" mean?