Activists from the Global Sumud Flotilla disembark a plane upon arriving at Istanbul Airport, in Istanbul, Turkey, Thursday, May 21, 2026. (AP Photo/Emrah Gurel)

University students and citizens stand in silence during commemorative traffic blockade to a train station tragedy that killed 16 people before the first big rally this year of opponents of President Aleksandar Vucic in Belgrade, Serbia, Monday, May 18, 2026. (AP Photo/Darko Vojinovic)

A car passes by a big screen showing Serbian President Aleksandar Vucic, reading: " I am too stubborn. I am too much of a Serb. I love Serbia too much to be to the taste of the power mongers." before his opponents first big rally this year in Belgrade, Serbia, Tuesday, May 19, 2026. (AP Photo/Darko Vojinovic)

University students and citizens stand in silence during commemorative traffic blockade to a train station tragedy that killed 16 people before the first big rally this year of opponents of President Aleksandar Vucic in Belgrade, Serbia, Monday, May 18, 2026. (AP Photo/Darko Vojinovic)

City bus passes by a sign covered with stickers that read: "Students win" before the first big rally this year of opponents of President Aleksandar Vucic in Belgrade, Serbia, Monday, May 18, 2026. (AP Photo/Darko Vojinovic)

People walk by a lamppost with stickers that read: "Students win" before the first big rally this year of opponents of President Aleksandar Vucic in Belgrade, Serbia, Monday, May 18, 2026. (AP Photo/Darko Vojinovic)

Secretary of State Marco Rubio speaks to the press before boarding his plane at Homestead Air Reserve Base, Thursday, May 21, 2026. Rubio is traveling to a NATO foreign ministers meeting in Sweden. (AP Photo/Julia Demaree Nikhinson, Pool)

FILE - Muslim pilgrims go to cast stones at pillars in the symbolic stoning of the devil, the last rite of the annual Hajj, in Mina near the holy city of Mecca, Saudi Arabia, June 6, 2025. (AP Photo/Amr Nabil, File)