Reuters reported that the United States military said in a separate statement it conducted drills with Japanese fighters after the exercise with South Korea, making it the first time U.S. bombers have conducted training with fighters from both Japan and South Korea at night.
North Korea watchers have been on alert for a possible provocation by the communist state in the days surrounding a key holiday Tuesday to mark the founding anniversary of its ruling party.
Mr Trump has been tough on North Korea as the regime has fired a series of ballistic missiles and conducted its sixth and most powerful nuclear test in recent months.
North Korean Foreign Minister Ri Yong Ho told Russia's state-run TASS news agency the US and North Korea have a "final score" to settle that can't be done with words, Reuters reported.
The Pacific Air Force said the bombers, assigned to the 37th Expeditionary Bomb Squadron, also trained with Japanese fighter jets on Tuesday, "making this the first time" the Lancers have conducted combined training with the allied nations at night.
"The briefing and discussion focused on a range of options to respond to any form of North Korean aggression or, if necessary to prevent North Korea from threatening the United States and its allies with nuclear weapons", it said without elaborating. Lee, who didn't specify his sources, said the plans allegedly stolen by the North include operations for tracking the movement of the North's leadership, isolating their hideouts, executing air assaults and follow-up actions for securing and eliminating targets, which would obviously include North Korean leader Kim Jong Un.
Park met Carter at the former president's home in Plains, Georgia, on September 28, he told South Korea's JoongAng Daily newspaper, with Carter saying he "wants to play a constructive role for peace on the Korean Peninsula, as he did in 1994".
Secret intelligence documents and photos collected by the USA military were among what was stolen from South Korea's classified information by Pyongyang hackers in September 2016. Last month he got China to agree to new U.N. Security Council sanctions on North Korea.
Fears the crisis could spiral into open conflict have risen as the communist state demonstrated rapid progress in its efforts to develop a nuclear-tipped missile that could target the USA mainland despite several rounds of punishing United Nations and other worldwide sanctions against it.
Carter's track record will make him even more palatable to the North, as he stepped in previously, in 1994, when then-US President Bill Clinton was drawing up plans for an attack on North Korea's nuclear reactor at Yongbyon. "This positive process is worth a try", the paper said in an editorial late on Tuesday.
"There's one thing that the U.S. Army can do, and that is you've got to be ready to ensure that we have military options that our President can employ if needed", Mattis said.
When it first opened in 2004, the Kaesong complex, located about 54 kilometers northwest of Seoul, was meant to promote inter-Korean development and give North Korean workers a taste of life in the south, including snack foods like the cakes known as Choco Pies and toiletries that were resold as luxury items in the North.