Kim Jong-un's Sister Resurfaces After Long Absence

North Korean leader Kim Jong-un's sister reappeared in the state media on Tuesday.

Kim Yo-jong vanished in April after the second U.S.-North Korea summit collapsed in Hanoi in February amid reports that she had been told to lie low.

The official Rodong Sinmun reported that Kim Yo-jong watched the country's notorious mass games at Pyongyang's May Day Stadium.

She was listed 10th after the leader's former right-hand man Kim Yong-chol, who was reportedly sent to a reeducation camp over the failed summit but also made a couple of public appearances this week.

Their reappearance suggests that Kim Jong-un has finished a sweeping purge of senior officials who were involved in the Hanoi summit.

Meanwhile, a North Korean Foreign Ministry spokesman said Washington should look back on the first anniversary of the "historic" U.S.-North Korea summit in Panmunjom and "change its current method of calculation and respond to our request" as soon as possible,.

Kim Jong-un did not enjoy the performance of thousands of gymnasts throwing shapes in unison, and reprimanded organizers for their "lack" of creativity and "irresponsible" work, according to the daily.

He took umbrage at the story and content rather than the performers themselves, but it is not clear why.