"It seems that the U.S. may interpret the situation in such a way as to seek a comfort for itself," Kim Yo Jong told the official Korean Central News Agency. "The expectation, which they chose to harbor the wrong way, would plunge them into a greater disappointment."
Last month, Park Sang-hak said he launched hot air balloons carrying 500,000 leaflets, 5,000 one-dollar bills and 500 anti-North Korean booklets across the border.
Kim—the sister of dictator Kim Jong Un—oversaw the destruction of the building in June in retaliation for propaganda balloons floated into the North by defector groups in the South.
The younger sister of Kim Jong Un said she had obtained special permission from her brother to acquire and watch the footage.
"It makes sense for North Korea to build up the sister now. Kim Jong Un's kids are too young to succeed him over the next 20 years," Professor Sung-Yoon Lee said.
The North Korean People's Army's General Staff said Monday the move would assist in "fortifying the front line and further strengthening the military border with South Korea."
The 31-year-old has risen rapidly through the ranks of the secretive regime to become a trusted lieutenant to her dictator older brother.
The White House released an official photo of President Donald Trump shaking hands with Kim Yo Jong, sister of North Korean dictator Kim Jong Un, Friday. The handshake, which took place during the Singapore Summit this week, marks a significant departure from Vice President Mike Pence's avoidance of the dignitary at the Winter Olympics earlier this year.
Kim's younger sister was the only woman at at the summit table and assisted her brother by handing him a pen, holding flowers and taking notes.
North Korean leader Kim Jong Un will set his foot on South Korean soil for the first time, with his sister right behind him.
North Korean media will no longer use the "comrade" title for the leader's wife.
North Korea's ruling family may soon be welcoming a new member, according to sources in Seoul.
Pence avoided any contact with Kim Yo Jong at the opening ceremony despite being seated in front of her.
Little is known about the first member of Kim Jong Un's family to enter South Korea, but experts say rising star Kim Yo Jong is all part of the plan.
It's an unprecedented move from North Korea.