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FILE - In this Friday, May 9, 2014 file photo, visitors look at decorations in the newly re-opened National Library in the Bosnian capital of Sarajevo. Sarajevo re-opened its reconstructed National Library building 22 years after the city landmark was destroyed during the Bosnian war along with its almost 2 million books and manuscripts. The re-opening comes in time for the June ceremonies that will mark the Centenary of the beginning of World War I. (AP Photo/Amel Emric, File) ( Travel Trip WWI Sarajevo )

In this Tuesday, April 8, 2014, visitors look through buildings in the old town, known as Bascarsija, in Sarajevo, Bosnia-Herzegovina. Despite the dark chapters of the past, today the city is defined by what locals call the "Sarajevo Spirit", an interesting and mostly harmonious mix of religions and cultures. (AP Photo/Amel Emric) ( Travel Trip WWI Sarajevo )

In this Tuesday, April 8, 2014, birds fly around the Sebilj fountain on the central square in Sarajevo, Bosnia-Herzegovina. Tourists usually stop at the Sebilj fountain on the central square for selfless and to refresh themselves from on to its pipes. (AP Photo/Amel Emric) ( Travel Trip WWI Sarajevo )

In this Tuesday, April 22, 2014, a Bosnian man drinks from a water pipe in the old town, known as Bascarsija, in Sarajevo, Bosnia-Herzegovina. Despite the dark chapters of the past, today the city is defined by what locals call the "Sarajevo Spirit", an interesting and mostly harmonious mix of religions and cultures. (AP Photo/Amel Emric) ( Travel Trip WWI Sarajevo )

FILE - In this Dec. 2, 2013 file photo, hostel manager, Nirela Smajovic, fixes up a room in the Franz Ferdinand hostel in Sarajevo, Bosnia. The hostel aims to liven up the memory of the June 28, 1914 assassination of the heir to the Austro-Hungarian throne by Bosnian Serb student Gavrilo Princip. A number of events are planned in Sarajevo around the Centenary of the assassination that triggered World War I. (AP Photo/Amel Emric, File) ( Travel Trip WWI Sarajevo )

In this Tuesday, May 6, 2014 photo, a woman serves up a local dish of meat pie in Sarajevo, Bosnia-Herzegovina. Despite the dark chapters of the past, today the city is defined by what locals call "the Sarajevo Spirit", an interesting and mostly harmonious mix of religions and cultures. (AP Photo/Amel Emric) ( Travel Trip WWI Sarajevo )

In this Tuesday, April 8, 2014, visitors look through store windows in the old town, known as Bascarsija, in Sarajevo, Bosnia-Herzegovina. Despite the dark chapters of the past, today the city is defined by what locals call the "Sarajevo Spirit", an interesting and mostly harmonious mix of religions and cultures. (AP Photo/Amel Emric) ( Travel Trip WWI Sarajevo )

In this Tuesday, May 6, 2014 photo, a Bosnian man produces hand made souvenirs in a shop in the old town, known as Bascarsija, in Sarajevo, Bosnia-Herzegovina. Despite the dark chapters of the past, today the city is defined by what locals call "the Sarajevo Spirit", an interesting and mostly harmonious mix of religions and cultures. (AP Photo/Amel Emric) ( Travel Trip WWI Sarajevo )

In this May 7, 2014 photo, Bosnian woman enjoy a coffee in a bar in Sarajevo, Bosnia-Herzegovina. Despite the dark chapters of the past, today the city is defined by what locals call "the Sarajevo Spirit", an interesting and mostly harmonious mix of religions and cultures. (AP Photo/Amel Emric) ( Travel Trip WWI Sarajevo )

In this Tuesday, April 22, 2014 photo, Princip Bridge and the surrounding buildings are illuminated at night in Sarajevo, Bosnia-Herzegovina. The city will host a number events around the Centenary of World War I, including a conference of historians and a concert. (AP Photo/Amel Emric) ( Travel Trip WWI Sarajevo )

FILe - In this Thursday, March 20, 2014 file photo, people walk inside a newly opened shopping center in Sarajevo, Bosnia. The center is part of a multi-purpose complex in downtown Sarajevo built by Saudi business group Al-Shiddi. The total value of the complex includes a five-star hotel and a business center is estimated at over 160 million euros. (AP Photo/Amel Emric, File) ( Travel Trip WWI Sarajevo )

This Tuesday, April 8, 2014 photo shows a panoramic view of Sarajevo through a window of an old Ottoman fortress. World War I is just one era in the history of this multicultural city, with its legacies of Islamic Ottoman, Jewish, Christian Orthodox and Roman Catholic religions. (AP Photo/Amel Emric) ( Travel Trip WWI Sarajevo )

FILE - In this Oct. 15, 2013 file photo, an elderly Bosnian Muslim prays outdoors in the outskirts of Sarajevo, Bosnia. The Great War left 14 million dead and made four empires disappear. But World War I is just one era in the history of this multicultural city. (AP Photo/Amel Emric, File) ( Travel Trip WWI Sarajevo )

This Tuesday, April 22, 2014 photo shows an overview of the city of Sarajevo, Bosnia-Herzegovina. World War I is just one era in the history of this multicultural city, with its legacies of Islamic Ottoman, Jewish, Christian Orthodox and Roman Catholic religions. (AP Photo/Amel Emric) ( Travel Trip WWI Sarajevo )

In this Tuesday, April 8, 2014 photo, an old cemetery overlooks the city of Sarajevo. While Sarajevo shares the scars of more recent wars, it is World War I that will be the focus in the coming months as the city hosts a series of events around the Centenary, including a conference of historians and concerts. (AP Photo/Amel Emric) ( Travel Trip WWI Sarajevo )

FILE - In this Sept. 11, 2012 file photo, Orthodox Christian priests and other Christian clergy pray outside the Sarajevo Cathedral in Sarajevo, Bosnia. World War I is just one era in the history of this multicultural city with its legacies of Islamic Ottoman, Jewish, Christian Orthodox and Roman Catholic religions. (AP Photo/Sulejman Omerbasic, File) ( Travel Trip WWI Sarajevo )

FILE - In this Jan. 7, 2014 file photo, Orthodox priests lead an Orthodox Christmas service at the Bosnian Orthodox church in Sarajevo, Bosnia. World War I is just one era in the history of this multicultural city with its legacies of Islamic Ottoman, Jewish, Christian Orthodox and Roman Catholic religions. (AP Photo/Amel Emric, File) ( Travel Trip WWI Sarajevo )

In this Thursday, April 17, 2014 photo, visitors take a tour in underground Sarajevo, Bosnia-Herzegovina. Despite the dark chapters of the past, today the city is defined by what locals call the "Sarajevo Spirit", an interesting and mostly harmonious mix of religions and cultures. (AP Photo/Amel Emric) ( Travel Trip WWI Sarajevo )

In this Tuesday, April 22, 2014, the City Hall is reflected in a puddle in Sarajevo, Bosnia-Herzegovina. The city will host a number events around the Centenary of World War I, including a conference of historians and a concert. (AP Photo/Amel Emric) ( Travel Trip WWI Sarajevo )