President Donald Trump on Monday tweeted that policies under previous US administrations have failed to contain the North Korean nuclear threat.
Trump has engaged in an escalating war of words with North Korean strongman Kim Jong-Un, trading insults amid rising tensions between the two nuclear-armed rivals.
The last flight by USA bombers was 17 days earlier when four US F-35B stealth fighter jets and two B-1Bs flew over the peninsula.
Russian Federation and China called for restraint on North Korea on Monday after U.S. President Donald Trump warned over the weekend that "only one thing will work" in dealing with Pyongyang, hinting that military action was on his mind, Reuters reports.
The compromised documents include wartime contingency plans drawn up by the US and South Korea and also include reports to the allies' senior commanders, Rhee Cheol-hee, a South Korean lawmaker was quoted as saying BBC Tuesday. The two are in South Korea for talks with top officials on Friday.
The South Korean Unification Ministry could not confirm that the complex has been reopened, but did say that recent bus movements and illuminated street lamps in the site have been observed.
Trump hosted a discussion on Tuesday on options to respond to any North Korean aggression or, if necessary, to prevent Pyongyang from threatening the United States and its allies with nuclear weapons, the White House said in a statement.
The B-1Bs also conducted exercises with Japan's Air Force in what the U.S. statement called a "sequenced bilateral mission".
The hack took place in September past year.
On Saturday, Trump made a similar comment on Twitter about how negotiations have failed for 25 years and said "only one thing will work" with North Korea.
"We reiterated our support for our collective strategy of maximum diplomatic and economic pressure on North Korea so it will be compelled to return to the negotiating table".
"The global community won't accept North Korea as a nuclear power. This positive process is worth a try", the paper said in an editorial late on Tuesday.
South Korean warships including the nation's first Aegis destroyer, Sejongdaewang (L), in this file photo. "Policy didn't work!" the US president said in a Twitter post on Monday.