Officials have anxious about such attacks coming from North Korea amidst political tensions with South Korea, and Russian Federation following the country's ban from the games due to a systematic doping scheme.
After Kim arrived at Incheon Airport and met with the Korean unification minister, Kim Yong Nam gestured for her to take the center seat at the table - leading many South Korean news outlets to conclude that she's essentially her brother's second in command.
Mattis said South Korea's defence minister Admiral Song Young-moo gave assurance that Seoul's alliance with the U.S. was unaffected by Pyongyang's overtures to Moon.
Samjiyon Band, a North Korean classical music ensemble, held their "Special Concert by Samjiyon Band for the PyeongChang Winter Olympics and Paralympics", concert on February 11 at the Haeoreum Theater in Seoul.
"They know what happened and this is a usual thing during the Olympic Games".
"In the midst of all of this, he (North Korean leader Kim Jong Un) ran a military parade that highlighted his ballistic missiles", Mattis told reporters on his plane en route to Rome on the first leg of a European tour.
Moon replied: "Our meeting was precious".
U.S. President Donald Trump and the North Korean leadership traded insults and threats of nuclear war as tensions rose, with Trump repeatedly dismissing the prospect or value of talks with North Korea. It warned against agreeing to talks before North Korea scrapped its nuclear program, saying it would only "benefit the enemy".
What do the Winter Olympics and the naked marathon in South Korea have in common? He also called for the need of a quick resumption of dialogue between North Korea and the United States.
Analysts say Kim Jong Un's decision to send his sister to the South reflected an eagerness to break out of diplomatic isolation by improving ties with the South, which the country could eventually use as a bridge to approach the United States.
"The fate of our nation must be determined by our own selves - we must not allow the repeat of unfortunate past history where our fate was determined with no regard to our opinions", Moon said in a speech to South Korean lawmakers in November. "But we'll also be there to stand with our allies, and remind the world that North Korea is the most tyrannical and oppressive regime on the planet".
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