People walk to pay their respects in front of the grave of the late Yugoslav Communist leader Josip Broz Tito at his mausoleum, "House of Flowers", during Tito's 129th birth anniversary in Belgrade, Serbia May 25, 2021. When ex-Yugoslavia communist leader Tito was alive, May 25 was celebrated as "Youth Day" and observed as a national holiday. REUTERS/Marko Djurica

People pay their respects in front of the grave of the late Yugoslav Communist leader Josip Broz Tito at his mausoleum, "House of Flowers", during Tito's 129th birth anniversary in Belgrade, Serbia May 25, 2021. When ex-Yugoslavia communist leader Tito was alive, May 25 was celebrated as "Youth Day" and observed as a national holiday. REUTERS/Marko Djurica

People pay their respect in front of the grave of the late Yugoslav Communist leader Josip Broz Tito at his mausoleum, "House of Flowers", during Tito's 129th birth anniversary in Belgrade, Serbia May 25, 2021. When ex-Yugoslavia communist leader Tito was alive, May 25 was celebrated as "Youth Day" and observed as a national holiday. REUTERS/Marko Djurica

People wait in line to pay their respect in front of the grave of the late Yugoslav Communist leader Josip Broz Tito at his mausoleum, "House of Flowers", during Tito's 129th birth anniversary in Belgrade, Serbia May 25, 2021. When ex-Yugoslavia communist leader Tito was alive, May 25 was celebrated as "Youth Day" and observed as a national holiday. REUTERS/Marko Djurica

A man holds a picture of the late Yugoslav Communist leader Josip Broz Tito at his mausoleum, "House of Flowers", during Tito's 129th birth anniversary in Belgrade, Serbia May 25, 2021. When ex-Yugoslavia communist leader Tito was alive, May 25 was celebrated as "Youth Day" and observed as a national holiday. REUTERS/Marko Djurica

People pay their respect in front of the grave of the late Yugoslav Communist leader Josip Broz Tito at his mausoleum, "House of Flowers", during Tito's 129th birth anniversary in Belgrade, Serbia May 25, 2021. When ex-Yugoslavia communist leader Tito was alive, May 25 was celebrated as "Youth Day" and observed as a national holiday. REUTERS/Marko Djurica

People pay their respect in front of the grave of the late Yugoslav Communist leader Josip Broz Tito at his mausoleum, "House of Flowers", during Tito's 129th birth anniversary in Belgrade, Serbia May 25, 2021. When ex-Yugoslavia communist leader Tito was alive, May 25 was celebrated as "Youth Day" and observed as a national holiday. REUTERS/Marko Djurica

A man stands in front of the grave of the late Yugoslav Communist leader Josip Broz Tito at his mausoleum, "House of Flowers", during Tito's 129th birth anniversary in Belgrade, Serbia May 25, 2021. When ex-Yugoslavia communist leader Tito was alive, May 25 was celebrated as "Youth Day" and observed as a national holiday. REUTERS/Marko Djurica

Children stand in front of the grave of the late Yugoslav Communist leader Josip Broz Tito at his mausoleum, "House of Flowers", during Tito's 129th birth anniversary in Belgrade, Serbia May 25, 2021. When ex-Yugoslavia communist leader Tito was alive, May 25 was celebrated as "Youth Day" and observed as a national holiday. REUTERS/Marko Djurica

People gather for a picture in front of the statue of late Yugoslav Communist leader Josip Broz Tito at his mausoleum, "House of Flowers", during Tito's 129th birth anniversary in Belgrade, Serbia May 25, 2021. When ex-Yugoslavia communist leader Tito was alive, May 25 was celebrated as "Youth Day" and observed as a national holiday. REUTERS/Marko Djurica

A picture of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, is projected on the walls of Petrovaradin fortress by the Danube river as people mourn after his death from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, by the Danube river after he died from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, by the Danube river after he died from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, by the Danube river after he died from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, by the Danube river after he died from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

A picture of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, is projected on the walls of Petrovaradin fortress by the Danube river as people mourn after his death from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

A picture of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, is projected on the walls of Petrovaradin fortress by the Danube river as people mourn after his death from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, by the Danube river after he died from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, by the Danube river after he died from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, by the Danube river after he died from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

A picture of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, is projected on the walls of Petrovaradin fortress by the Danube river as people moun his death after he died from coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

A picture of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, is projected on the walls of Petrovaradin fortress by the Danube river as people mourn after his death from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

A picture of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, is projected on the walls of Petrovaradin fortress by the Danube river as people mourn after his death from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

A picture of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, is projected on the walls of Petrovaradin fortress by the Danube river as people mourn after his death from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, after he died from coronavirus disease (COVID-19), in Novi Sad, Serbia, February 20, 2021. REUTERS/Marko Djurica TPX IMAGES OF THE DAY

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, after he died from coronavirus disease (COVID-19), in Novi Sad, Serbia, February 20, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, after he died from coronavirus disease (COVID-19), in Novi Sad, Serbia, February 20, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, after he died from coronavirus disease (COVID-19), in front of his house in Novi Sad, Serbia, February 20, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, after he died from coronavirus disease (COVID-19), in front of his house in Novi Sad, Serbia, February 20, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, after he died from coronavirus disease (COVID-19), in Novi Sad, Serbia, February 20, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, after he died from coronavirus disease (COVID-19), in Novi Sad, Serbia, February 20, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, after he died from coronavirus disease (COVID-19), in front of his house in Novi Sad, Serbia, February 20, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, after he died from coronavirus disease (COVID-19), in Novi Sad, Serbia, February 20, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, after he died from coronavirus disease (COVID-19), in Novi Sad, Serbia, February 20, 2021. REUTERS/Marko Djurica

A man works inside Galeb yacht in Kraljevica shipyard as the city of Rijeka started converting the yacht Galeb used by Yugoslavia's communist leader Josip Broz Tito into a floating museum that will be moored in the city's harbour, in Kraljevica, Croatia December 8, 2020. Picture is taken December 8, 2020. REUTERS/Antonio Bronic

Workers clean inside Galeb yacht in Kraljevica shipyard as the city of Rijeka started converting the yacht Galeb used by Yugoslavia's communist leader Josip Broz Tito into a floating museum that will be moored in the city's harbour, in Kraljevica, Croatia December 8, 2020. Picture is taken December 8, 2020. REUTERS/Antonio Bronic

People work inside Galeb yacht in Kraljevica shipyard as the city of Rijeka started converting the yacht Galeb used by Yugoslavia's communist leader Josip Broz Tito into a floating museum that will be moored in the city's harbour, in Kraljevica, Croatia December 8, 2020. Picture is taken December 8, 2020. REUTERS/Antonio Bronic

A worker cleans inside Galeb yacht in Kraljevica shipyard as the city of Rijeka started converting the yacht Galeb used by Yugoslavia's communist leader Josip Broz Tito into a floating museum that will be moored in the city's harbour, in Kraljevica, Croatia December 8, 2020. Picture is taken December 8, 2020. REUTERS/Antonio Bronic

A bow deck of the Galeb yacht is seen at Kraljevica shipyard as the city of Rijeka started converting the yacht Galeb used by Yugoslavia's communist leader Josip Broz Tito into a floating museum that will be moored in the city's harbour, in Kraljevica, Croatia December 8, 2020. Picture is taken December 8, 2020. REUTERS/Antonio Bronic

The Galeb yacht is seen in Kraljevica shipyard as the city of Rijeka started converting the yacht Galeb used by Yugoslavia's communist leader Josip Broz Tito into a floating museum that will be moored in the city's harbour, in Kraljevica, Croatia December 8, 2020. Picture is taken December 8, 2020. REUTERS/Antonio Bronic

The Galeb yacht is seen in Kraljevica shipyard as the city of Rijeka started converting the yacht Galeb used by Yugoslavia's communist leader Josip Broz Tito into a floating museum that will be moored in the city's harbour, in Kraljevica, Croatia December 8, 2020. Picture is taken December 8, 2020. REUTERS/Antonio Bronic

A worker cleans inside Galeb yacht in Kraljevica shipyard as the city of Rijeka started converting the yacht Galeb used by Yugoslavia's communist leader Josip Broz Tito into a floating museum that will be moored in the city's harbour, in Kraljevica, Croatia December 8, 2020. Picture is taken December 8, 2020. REUTERS/Antonio Bronic

Workers clean inside Galeb yacht in Kraljevica shipyard as the city of Rijeka started converting the yacht Galeb used by Yugoslavia's communist leader Josip Broz Tito into a floating museum that will be moored in the city's harbour, in Kraljevica, Croatia December 8, 2020. Picture is taken December 8, 2020. REUTERS/Antonio Bronic

A man holds a former Yugoslavia flag after paying his respects to the late Yugoslav Communist leader Josip Broz Tito at his mausoleum, "House of Flowers", marking the 40th anniversary of his death as the spread of the coronavirus disease (COVID-19) continues in Belgrade, Serbia, May 4, 2020. REUTERS/Marko Djurica

A man holds a former Yugoslavia flag after paying his respects to the late Yugoslav Communist leader Josip Broz Tito at his mausoleum, "House of Flowers", marking the 40th anniversary of his death as the spread of the coronavirus disease (COVID-19) continues in Belgrade, Serbia, May 4, 2020. REUTERS/Marko Djurica

ON THIS DAY -- March 20 March 20, 1994: SOCCER - British soldiers cheer on the United Nations team during a match against FC Sarajevo, which was played in front of 20,000 fans in the former 1984 Winter Olympics Stadium Zetra. Eight years after the erstwhile Yugoslavia became the first socialist state to host the Winter Games, Sarajevo was at the heart of the Bosnian War which lasted until 1995. The match, which ended 4-0 in favour of the local team, was also marked by entertainment by British army parachutists and a Buckingham Palace band. "It's a very big event ... By this match today I believe we're advancing the peace process in Bosnia-Herzegovina and not just in Sarajevo," Britain's Michael Rose, the head the U.N. peacekeeping efforts in Bosnia, said. REUTERS/Chris Helgren

Orthodox believers attend a protest march against a new law on religious freedom and legal rights of religious organizations in Zabljak, Montenegro February 27, 2020. Under the law, religious communities in the tiny Adriatic state would need to prove property ownership from before 1918, when predominantly Orthodox Christian Montenegro joined the Kingdom of Serbs, Croats and Slovenes, the predecessor of the now-defunct Yugoslavia. REUTERS/Marko Djurica

An orthodox believer attends a protest march against a new law on religious freedom and legal rights of religious organizations in Zabljak, Montenegro February 27, 2020. Under the law, religious communities in the tiny Adriatic state would need to prove property ownership from before 1918, when predominantly Orthodox Christian Montenegro joined the Kingdom of Serbs, Croats and Slovenes, the predecessor of the now-defunct Yugoslavia. REUTERS/Marko Djurica

An orthodox believer attends a protest march against a new law on religious freedom and legal rights of religious organizations in Zabljak, Montenegro February 27, 2020. Under the law, religious communities in the tiny Adriatic state would need to prove property ownership from before 1918, when predominantly Orthodox Christian Montenegro joined the Kingdom of Serbs, Croats and Slovenes, the predecessor of the now-defunct Yugoslavia. REUTERS/Marko Djurica

An orthodox believer attends a protest march against a new law on religious freedom and legal rights of religious organizations in Zabljak, Montenegro February 27, 2020. Under the law, religious communities in the tiny Adriatic state would need to prove property ownership from before 1918, when predominantly Orthodox Christian Montenegro joined the Kingdom of Serbs, Croats and Slovenes, the predecessor of the now-defunct Yugoslavia. REUTERS/Marko Djurica

Orthodox believers attend a protest march against a new law on religious freedom and legal rights of religious organizations in Zabljak, Montenegro February 27, 2020. Under the law, religious communities in the tiny Adriatic state would need to prove property ownership from before 1918, when predominantly Orthodox Christian Montenegro joined the Kingdom of Serbs, Croats and Slovenes, the predecessor of the now-defunct Yugoslavia. REUTERS/Marko Djurica

Orthodox believers attend a protest march against a new law on religious freedom and legal rights of religious organizations in Zabljak, Montenegro February 27, 2020. Under the law, religious communities in the tiny Adriatic state would need to prove property ownership from before 1918, when predominantly Orthodox Christian Montenegro joined the Kingdom of Serbs, Croats and Slovenes, the predecessor of the now-defunct Yugoslavia. REUTERS/Marko Djurica

Orthodox believers attend a protest march against a new law on religious freedom and legal rights of religious organizations in Zabljak, Montenegro February 27, 2020. Under the law, religious communities in the tiny Adriatic state would need to prove property ownership from before 1918, when predominantly Orthodox Christian Montenegro joined the Kingdom of Serbs, Croats and Slovenes, the predecessor of the now-defunct Yugoslavia. REUTERS/Marko Djurica

Orthodox believers attend a protest march against a new law on religious freedom and legal rights of religious organizations in Zabljak, Montenegro February 27, 2020. Under the law, religious communities in the tiny Adriatic state would need to prove property ownership from before 1918, when predominantly Orthodox Christian Montenegro joined the Kingdom of Serbs, Croats and Slovenes, the predecessor of the now-defunct Yugoslavia. REUTERS/Marko Djurica

Orthodox believers attend a protest march against a new law on religious freedom and legal rights of religious organizations in Zabljak, Montenegro February 27, 2020. Under the law, religious communities in the tiny Adriatic state would need to prove property ownership from before 1918, when predominantly Orthodox Christian Montenegro joined the Kingdom of Serbs, Croats and Slovenes, the predecessor of the now-defunct Yugoslavia. REUTERS/Marko Djurica

Orthodox believers attend a protest march against a new law on religious freedom and legal rights of religious organizations in Zabljak, Montenegro February 27, 2020. Under the law, religious communities in the tiny Adriatic state would need to prove property ownership from before 1918, when predominantly Orthodox Christian Montenegro joined the Kingdom of Serbs, Croats and Slovenes, the predecessor of the now-defunct Yugoslavia. REUTERS/Marko Djurica

Orthodox believers attend a protest march against a new law on religious freedom and legal rights of religious organizations in Zabljak, Montenegro February 27, 2020. Under the law, religious communities in the tiny Adriatic state would need to prove property ownership from before 1918, when predominantly Orthodox Christian Montenegro joined the Kingdom of Serbs, Croats and Slovenes, the predecessor of the now-defunct Yugoslavia. REUTERS/Marko Djurica

Orthodox believers gather inside a church before a protest march against a new law on religious freedom and legal rights of religious organizations in Zabljak, Montenegro February 27, 2020. Under the law, religious communities in the tiny Adriatic state would need to prove property ownership from before 1918, when predominantly Orthodox Christian Montenegro joined the Kingdom of Serbs, Croats and Slovenes, the predecessor of the now-defunct Yugoslavia. REUTERS/Marko Djurica

Orthodox believers attend a protest march against a new law on religious freedom and legal rights of religious organizations in Zabljak, Montenegro February 27, 2020. Under the law, religious communities in the tiny Adriatic state would need to prove property ownership from before 1918, when predominantly Orthodox Christian Montenegro joined the Kingdom of Serbs, Croats and Slovenes, the predecessor of the now-defunct Yugoslavia. REUTERS/Marko Djurica

Orthodox believers attend a protest march against a new law on religious freedom and legal rights of religious organizations in Zabljak, Montenegro February 27, 2020. Under the law, religious communities in the tiny Adriatic state would need to prove property ownership from before 1918, when predominantly Orthodox Christian Montenegro joined the Kingdom of Serbs, Croats and Slovenes, the predecessor of the now-defunct Yugoslavia. REUTERS/Marko Djurica