Activists from Women Cross DMZ take part in a rally in front of the US Embassy in Seoul, South Korea, May 25, 2018, to call for the US-DPRK summit to be held as planned, rather than canceled as announced by US President Donald Trump the previous day. (Xinhua/Lee Sang-ho)

Activists from Women Cross DMZ take part in a rally in front of the US Embassy in Seoul, South Korea, May 25, 2018, to call for the US-DPRK summit to be held as planned, rather than canceled as announced by US President Donald Trump the previous day. (Xinhua/Lee Sang-ho)

Activists from Women Cross DMZ take part in a rally in front of the US Embassy in Seoul, South Korea, May 25, 2018, to call for the US-DPRK summit to be held as planned, rather than canceled as announced by US President Donald Trump the previous day. (Xinhua/Lee Sang-ho)

Activists from Women Cross DMZ take part in a rally in front of the US Embassy in Seoul, South Korea, May 25, 2018, to call for the US-DPRK summit to be held as planned, rather than canceled as announced by US President Donald Trump the previous day. (Xinhua/Lee Sang-ho)