FILE - In this Aug. 22, 2020 file photo, tribesmen loyal to Houthi rebels hold their weapons as they ride in a vehicle during a gathering against the agreement to establish diplomatic relations between Israel and the United Arab Emirates, in Sanaa, Yemen. Human Rights Watch warned Monday, Sept. 14, 2020 that warring parties in Yemen's yearslong conflict are severely restricting the delivery of desperately needed aid as the country slides toward famine amid the coronavirus pandemic. (AP Photo/Hani Mohammed, File)