Thousands of Lebanese of Armenian descent, holding banners and Armenian flags, march to mark the 100th anniversary of the mass killing of Armenians by Ottoman Turks around the time of World War I, in Antelias, north of Beirut, Lebanon, Friday, April 24, 2015 (Photo: AP)

Thousands of Lebanese of Armenian descent, holding banners and a giant Armenian flag, march to mark the 100th anniversary of the mass killings of Armenians by Ottoman Turks around the time of World War I, in Antelias, north of Beirut, Lebanon, Friday, April 24, 2015 (Photo: AP)

(L-R) Catholicos Karekin II, the supreme head of the Armenian Apostolic Church, Armenia's President Serzh Sargsyan together with his wife Rita, Russia's President Vladimir Putin, Cyprus President Nicos Anastasiades and France's President Francois Hollande lay flowers during a commemoration ceremony marking the centenary of the mass killing of Armenians by Ottoman Turks in Yerevan, Armenia, April 24, 2015 (Photo: Reuters)

Armenian Church priests bless the icon with in Echmiadzin, the religious center of the Armenian Church outside the capital Yerevan, Armenia, Thursday, April 23, 2015 (Photo: AP)

Armenians attend a service in Echmiadzin, the religious center of the Armenian Church outside the Armenian capital, Yerevan, Thursday, April 23, 2015 (Photo: AP)

People attend a canonisation ceremony for the victims of mass killings of Armenians by Ottoman Turks at the open-air altar of Armenia's main cathedral in Echmiadzin April 23, 2015 (Photo: Reuters)

Armenians attend a service at downtown Cairo's Armenian Orthodox Patriarchate, Egypt, Thursday, April 23, 2015 (Photo: Randa Ali)

Armenians attend a service at downtown Cairo's Armenian Orthodox Patriarchate, Egypt, Thursday, April 23, 2015 (Photo: Randa Ali)

General view of the congregation attending an Ecumenical service marking the 100th anniversary of the mass killings of 1.5 million Armenians by Ottoman Turkish forces, at the cathedral in Berlin April 23, 2015. Taken with a fisheye lens (Photo: Reuters)

General view of the congregation attending an Ecumenical service marking the 100th anniversary of the mass killings of 1.5 million Armenians by Ottoman Turkish forces, at the cathedral in Berlin April 23, 2015 (Photo: Reuters)

German President Joachim Gauck, second left, and his partner Dabiela Schadt, left, attend an ecumenical service remembering the Armenian slaughter at the Berlin Cathedral Church in Berlin, Germany, Thursday, April 23, 2015 (Photo: AP)

From second left, Armenian Apostolic Church leader Catholicos Garegin II, Serbian President Tomislav Nikolic, Russian President Vladimir Putin, Rita, the wife of Armenia's President Serge Sarkisian and French President Francois Hollande attend a ceremony at the Tsitsernakaberd Armenian Genocide memorial complex in Yerevan, Armenia, Friday, April 24, 2015 (Photo: AP)

The year 1915 is formed with candles during a memorial march by Armenians in front of the Brandenburg Gate after an Ecumenical service marking the 100th anniversary of the mass killings of 1.5 million Armenians by Ottoman Turkish forces, at the cathedral in Berlin April 23, 2015 (Photo: Reuters)

Archbishop Aram Ateshian, General Vicar of the Armenian Patriarch in Turkey, (C) holds a mass at Surp Asdvadzadzin Patriarchal Church in Istanbul April 24, 2015, as part of events to commemorate the victims of mass killings of Armenians by Ottoman Turks (Photo: Reuters)

Visitors listen to Armenian priest Vagarsag Seropyan at the Surp Asdvadzadzin Patriarchal Church in Istanbul April 23, 2015 (Photo: Reuters)

Syrian Armenian scouts wave a Syrian and an Armenian national flags as they march in the old city of Damascus, April 23, 2015, to mark the 100th anniversary of the mass killing of Armenians in the Ottoman Empire in 1915. Picture taken April 23, 2015 (Photo: Reuters)

Armenians hold up banners and national flags during a memorial march after an Ecumenical service marking the 100th anniversary of the mass killings of 1.5 million Armenians by Ottoman Turkish forces, at the cathedral in Berlin April 23, 2015 (Photo: Reuters)

Members of the Armenian community attend a memorial march marking the 100th anniversary of the mass killings of 1.5 million Armenians by Ottoman Turkish forces in Jerusalem's Old City April 23, 2015 (Photo: Reuters)

Members of the Armenian community attend a memorial march marking the 100th anniversary of the mass killings of 1.5 million Armenians by Ottoman Turkish forces in Jerusalem's Old City April 23, 2015 (Photo: Reuters)