A plane carrying Houthi members lands at the Sanaa International Airport during a prisoner swap, in Sanaa, Yemen, Oct. 15, 2020. The Yemeni government and Houthi militia on Thursday began a long-awaited large swap of prisoners as a major breakthrough in peace efforts. (Photo by Mohammed Mohammed/Xinhua)

Houthi members disembark a plane as they arrive at the Sanaa International Airport during a prisoner swap, in Sanaa, Yemen, Oct. 15, 2020. The Yemeni government and Houthi militia on Thursday began a long-awaited large swap of prisoners as a major breakthrough in peace efforts. (Photo by Mohammed Mohammed/Xinhua)

Houthi members disembark a plane as they arrive at the Sanaa International Airport during a prisoner swap, in Sanaa, Yemen, Oct. 15, 2020. The Yemeni government and Houthi militia on Thursday began a long-awaited large swap of prisoners as a major breakthrough in peace efforts. (Photo by Mohammed Mohammed/Xinhua)

A freed Houthi member is seen at the Sanaa International Airport during a prisoner swap, in Sanaa, Yemen, Oct. 15, 2020. The Yemeni government and Houthi militia on Thursday began a long-awaited large swap of prisoners as a major breakthrough in peace efforts. (Photo by Mohammed Mohammed/Xinhua)

A plane carrying Houthi members lands at the Sanaa International Airport during a prisoner swap, in Sanaa, Yemen, Oct. 15, 2020. The Yemeni government and Houthi militia on Thursday began a long-awaited large swap of prisoners as a major breakthrough in peace efforts. (Photo by Mohammed Mohammed/Xinhua)

Freed Houthi members shout slogans as they arrive at the Sanaa International Airport during a prisoner swap, in Sanaa, Yemen, Oct. 15, 2020. The Yemeni government and Houthi militia on Thursday began a long-awaited large swap of prisoners as a major breakthrough in peace efforts. (Photo by Mohammed Mohammed/Xinhua)

People gather to receive freed Houthi members at the Sanaa International Airport during a prisoner swap, in Sanaa, Yemen, Oct. 15, 2020. The Yemeni government and Houthi militia on Thursday began a long-awaited large swap of prisoners as a major breakthrough in peace efforts. (Photo by Mohammed Mohammed/Xinhua)

Freed Houthi members shout slogans as they arrive at the Sanaa International Airport during a prisoner swap, in Sanaa, Yemen, Oct. 15, 2020. The Yemeni government and Houthi militia on Thursday began a long-awaited large swap of prisoners as a major breakthrough in peace efforts. (Photo by Mohammed Mohammed/Xinhua)