It's the first defection of this kind in a decade.
After calling President Donald Trump a "mad dog," North Korea said we're all victims of the U.S. leader.
The drills are scheduled to take place November 11-14.
The president mentioned his course in an address to the national assembly.
The facility was recently expanded at a cost of around $11 billion, largely contributed by the South Korean government.
Japan is the only country ever attacked with a nuclear weapon, and more than 72 years later it has the ability to build a bomb of its own.
Trump will spend only one day in South Korea.
The methods used were similar to other attacks attributed to North Korea.
“It cannot be that North Korea is the only Korean country in the world that has nuclear weapons."
The land-based system can shoot down a missile both inside and just outside the atmosphere.
The monster-themed ballistic missile is part of a three-tier attack plan designed to inflict "unbearable cost" to North Korea's military and government.
The South Korean Navy is currently conducting a maritime drill with the U.S. Navy, which deployed its 100,000-ton aircraft carrier USS Ronald Reagan.
The latest threat comes as the U.S. and South Korea hold joint naval drills.
The hacking attack occurred last year, but the South Korean defense ministry has said little about it.
The U.S. president is reportedly considering visiting the border area splitting the Korean peninsula on his tour of Asia.
South Korea is adding the weapons to its arsenal as part of one of recently-developed military programs, the so-called “Kill Chain.”
North Korea claims it foiled a joint CIA and South Korean plot on Kim Jong Un’s life and blasted Washington’s global war on terror.
The American and South Korean delegations met in Washington for a second round of talks on the deal, known as the KORUS FTA, this week.
New analysis uses North Korea’s estimated capabilities to calculate the amount of casualties that would result from a nuclear attack.