Britain's Prince Charles and his wife Camilla, the Duchess of Cornwall arrive at the archeological site of Knossos, on the island of Crete, Greece, May 11, 2018. Aris Messinis/Pool via REUTERS 

Britain's Prince Charles and his wife and Camilla, the Duchess of Cornwall arrive at the archeological site of Knossos, on the island of Crete, Greece, May 11, 2018. Aris Messinis/Pool via REUTERS 

Young Konstantinos Finiakakis hugs Camilla, the Duchess of Cornwall during her visit at the archeological site of Knossos, on the island of Crete, Greece, May 11, 2018. Aris Messinis/Pool via REUTERS 

Britain's Prince Charles and his wife Camilla, the Duchess of Cornwall visit the archeological site of Knossos, on the island of Crete, Greece, May 11, 2018. Aris Messinis/Pool via REUTERS 

Britain's Prince Charles and his wife Camilla, the Duchess of Cornwall visit the archeological site of Knossos, on the island of Crete, Greece, May 11, 2018. Aris Messinis/Pool via REUTERS 

Britain's Prince Charles and his wife Camilla, the Duchess of Cornwall arrive at the archeological site of Knossos, on the island of Crete, Greece, May 11, 2018. Aris Messinis/Pool via REUTERS 

Britain's Prince Charles arrives at the archeological site of Knossos, on the island of Crete, Greece, May 11, 2018. Aris Messinis/Pool via REUTERS 

Britain's Prince Charles and his wife Camilla, Duchess of Cornwall are welcomed at the city of Heraklion on the island of Crete, Greece, May 11, 2018. REUTERS/Stefanos Rapanis 

Britain's Prince Charles and his wife Camilla, Duchess of Cornwall arrive at the city of Heraklion on the island of Crete, Greece, May 11, 2018. REUTERS/Stefanos Rapanis 

Medics transfer a woman injured during an earthquake off the island of Kos, to the hospital of the city of Heraklion on the island of Crete, Greece July 21, 2017. REUTERS/Stefanos Rapanis 

Medics transfer an man injured during an earthquake off the island of Kos, to the hospital of the city of Heraklion on the island of Crete, Greece July 21, 2017. REUTERS/Stefanos Rapanis 

Medics transfer an man injured during an earthquake off the island of Kos, to the hospital of the city of Heraklion on the island of Crete, Greece July 21, 2017. REUTERS/Stefanos Rapanis 

Suspected members of an international criminal organization smuggling undocumented migrants to European countries are transferred to the prosecutor after being arrested at the city of Heraklion on the island of Crete, Greece, March 4, 2017. REUTERS/Stefanos Rapanis TPX IMAGES OF THE DAY TPX IMAGES OF THE DAY 

Suspected members of an international criminal organization smuggling undocumented migrants to European countries are transferred to the prosecutor after being arrested at the city of Heraklion on the island of Crete, Greece, March 4, 2017. REUTERS/Stefanos Rapanis 

Undocumented migrants are transferred to the police headquarters after being arrested during an operation to dismantle an international smuggling ring at the city of Heraklion on the island of Crete, Greece, March 3, 2017. REUTERS/Stefanos Rapanis 

Undocumented migrants are seen on a police bus after being arrested during an operation to dismantle an international smuggling ring at the city of Heraklion on the island of Crete, Greece, March 3, 2017. REUTERS/Stefanos Rapanis 

Leader of New Democracy conservative party Evangelos Meimarakis waves to party supporters before his speech at a pre-election rally at the city of Heraklion on the Greek island of Crete, September 2, 2015. Greek leftist Syriza party on Wednesday fell behind its main conservative rivals for the first time since former premier Alexis Tsipras resigned, offering further evidence that his decision to call a snap election could backfire. REUTERS/Stefanos Rapanis 

Leader of New Democracy conservative party Evangelos Meimarakis addresses party supporters before a pre-election rally at the city of Heraklion on the Greek island of Crete, September 2, 2015. Greek leftist Syriza party on Wednesday fell behind its main conservative rivals for the first time since former premier Alexis Tsipras resigned, offering further evidence that his decision to call a snap election could backfire. REUTERS/Stefanos Rapanis 

Leader of New Democracy conservative party Evangelos Meimarakis (C) is welcomed by party supporters before a pre-election rally at the city of Heraklion on the Greek island of Crete, September 2, 2015. Greek leftist Syriza party on Wednesday fell behind its main conservative rivals for the first time since former premier Alexis Tsipras resigned, offering further evidence that his decision to call a snap election could backfire. REUTERS/Stefanos Rapanis 

Greek coast guard special forces officers and crew members are seen onboard the "Haddad 1" freighter, at the port of Heraklion on the Greek island of Crete, September 2, 2015. Greek authorities have seized a freighter carrying an undeclared shipment of weapons en route from Turkey to Libya, coast guard officials said on Wednesday. REUTERS/Stefanos Rapanis 

The "Haddad 1" freighter is moored at the port of Heraklion following an operation of the Greek coast guard on the island of Crete, September 2, 2015. Greek authorities have seized a freighter carrying an undeclared shipment of weapons en route from Turkey to Libya, coast guard officials said on Wednesday. REUTERS/Stefanos Rapanis 

Greek coast guard special forces officers escort crew members on the deck of the "Haddad 1" freighter, at the port of Heraklion on the Greek island of Crete, September 2, 2015. Greek authorities have seized a freighter carrying an undeclared shipment of weapons en route from Turkey to Libya, coast guard officials said on Wednesday. REUTERS/Stefanos Rapanis 

Members of the Greek coast guard special forces are seen onboard the "Haddad 1" freighter, at the port of Heraklion on the Greek island of Crete, September 2, 2015. Greek authorities have seized a freighter carrying an undeclared shipment of weapons en route from Turkey to Libya, coast guard officials said on Wednesday. REUTERS/Stefanos Rapanis 

A member of the Greek coast guard special forces is seen onboard the "Haddad 1" freighter, at the port of Heraklion on the Greek island of Crete, September 2, 2015. Greek authorities have seized a freighter carrying an undeclared shipment of weapons en route from Turkey to Libya, coast guard officials said on Wednesday. REUTERS/Stefanos Rapanis 

Greek conservative party leader Antonis Samaras waves at supporters during a pre-election rally in the town of Heraklion on the island of Crete April 29, 2012. Greece is to hold an election on May 6, with the largest number of seats expected to fall to the New Democracy party, whose leader Samaras is pledging lower taxes, of all things, and to call a halt to across-the-board wage and pension cuts, expecting to make up the shortfall through better collections. REUTERS/Image Services/Stefanos Rapanis (GREECE - Tags: POLITICS ELECTIONS) 

Greek conservative party leader Antonis Samaras (L) is welcomed by supporters during a pre-election rally in the town of Heraklion on the island of Crete April 29, 2012. Greece is to hold an election on May 6, with the largest number of seats expected to fall to the New Democracy party, whose leader Samaras is pledging lower taxes, of all things, and to call a halt to across-the-board wage and pension cuts, expecting to make up the shortfall through better collections. REUTERS/Image Services/Stefanos Rapanis (GREECE - Tags: POLITICS) 

Greek conservative party leader Antonis Samaras addresses supporters during a pre-election rally in the town of Heraklion on the island of Crete April 29, 2012. Greece is to hold an election on May 6, with the largest number of seats expected to fall to the New Democracy party, whose leader Samaras is pledging lower taxes, of all things, and to call a halt to across-the-board wage and pension cuts, expecting to make up the shortfall through better collections. REUTERS/Image Services/Stefanos Rapanis (GREECE - Tags: POLITICS ELECTIONS) 

Greek conservative party leader Antonis Samaras (C) greets supporters during a pre-election rally in the town of Heraklion on the island of Crete April 29, 2012. Greece is to hold an election on May 6, with the largest number of seats expected to fall to the New Democracy party, whose leader Samaras is pledging lower taxes, of all things, and to call a halt to across-the-board wage and pension cuts, expecting to make up the shortfall through better collections. REUTERS/Image Services/Stefanos Rapanis (GREECE - Tags: POLITICS ELECTIONS) 

A tourist enjoys a beach with her mother at Gouves village near Heraklion town on the island of Crete March 31, 2009. Recession-hit Europeans are trimming travel plans and their absence threatens a vital source of income in a country that relies on tourism for about one in five jobs. Holiday bookings fell about 15 to 20 percent from 2008, according to the Pan-Hellenic Federation of Tourism Enterprises (POET). Hotels have slashed prices to counter the drop, hoping wary consumers may push spending decisions to the last moment. Photo taken March 31, 2009. To match feature GREECE-TOURISM/ REUTERS/Yiorgos Karahalis (GREECE TRAVEL SOCIETY BUSINESS) 

A tourist walks on a promenade past a tavern at Gouves village near Heraklion town on the island of Crete March 31, 2009. Recession-hit Europeans are trimming travel plans and their absence threatens a vital source of income in a country that relies on tourism for about one in five jobs. Holiday bookings fell about 15 to 20 percent from 2008, according to the Pan-Hellenic Federation of Tourism Enterprises (POET). Hotels have slashed prices to counter the drop, hoping wary consumers may push spending decisions to the last moment. Photo taken March 31, 2009. To match feature GREECE-TOURISM/ REUTERS/Yiorgos Karahalis (GREECE TRAVEL SOCIETY BUSINESS) 

-PHOTO TAKEN 31MAR04- Greece player Themis Nikolaidis against [Switzerland] in Heraklion, Crete, March 31, 2004. 

-PHOTO TAKEN 31MAR04- Greece player Michail Kapsis against [Switzerland] in Heraklion, Crete, March 31, 2004. 

-PHOTO TAKEN 31MAR04- Greece midfielder Theo Zagorakis against [Switzerland] in Heraklion, Crete, March 31, 2004. 

-PHOTO TAKEN 31MAR04- Greece midfielder Konstas Katsouranis against [Switzerland] in Heraklion, Crete, March 31, 2004. 

The Switzerland national soccer team: (back row LtoR) Patrick Mueller, Stephane Chapuisat, Bernt Haas, Stephane Henchoz, Alexander Frei and Bruno Berner. Front Rown, (LtoR) Joerg Stiel, Johann Lonfat, Fabio Celestini, Hakan Yakin and Raphael Wicky. Picture taken on March 31, 2004 in Heraklion Crete. REUTERS/Pascal Lauener EURO 2004 PREVIEW TEAM GROUP PLA/AS 

Greece player Themis Nikolaidis in Heraklion, Crete, March 31, 2004. EURO 2004 PREVIEW REUTERS/Pascal Lauener PLA/AS 

Greece player Michail Kapsis in Heraklion, Crete, March 31, 2004. EURO 2004 PREVIEW REUTERS/Pascal Lauener PLA/AS 

Greece midfielder Theo Zagorakis in Heraklion, Crete, March 31, 2004. EURO 2004 PREVIEW REUTERS/Pascal Lauener PLA/AS 

Greece midfielder Konstas Katsouranis against Switzerland in Heraklion, Crete, March 31, 2004. REUTERS/Pascal Lauener EURO 2004 PREVIEW PLA/AS 

Greece's Themis Nikolaidis (R) tackles, new Switzerland's player Daniel Gygax (L) during their international friendly match at Pankrition Stadium, Heraklion, Crete March 31, 2004. REUTERS/Pascal Lauener PLA/THI 

Switzerland's coach Koebi Kuhn reacts during the international friendly match against Greece at the Pankrition Stadium, Heraklion, Crete March 31, 2004. Greece won the match 1-0. REUTERS/Pascal Lauener PLA/ 

Greece's Themis Nikolaidis (L) challenges Switzerland's Stephane Henchoz (R) during their international friendly match at Pankrition Stadium, Heraklion, Crete March 31, 2004. REUTERS/Pascal Lauener PLA/THI 

Swiss goalkeeping coach Erich Burgener (L) congratulates Swiss goalkeeper Joerg Stiel (R) during their international friendly match against Greece at the Pankrition Stadium, Heraklion, Crete March 31, 2004. REUTERS/Pascal Lauener PLA/ 

Greece's Theo Zagorakis (R) challenges Switzerland's Stephane Chapuisat (L) during their international friendly match at Pankrition Stadium, Heraklion, Crete March 31, 2004. REUTERS/Pascal Lauener PLA/THI 

Greece's Theo Zagorakis (R) challenges Switzerland's Stephane Chapuisat (L) during their international friendly match at the Pankrition Stadium, Heraklion, Crete March 31, 2004. REUTERS/Pascal Lauener PLA/ 

Greece's Theo Zagorakis (L) challenges Switzerland's Raphael Wicky (R) during their international friendly match at the Pankrition Stadium, Heraklion, Crete, March 31, 2004. REUTERS/Pascal Lauener PLA/ 

German coach of Greece national soccer team Otto Rehagel gives a news conference in Heraklion, Crete, March 30, 2004. [Greece will play Switzerland in a friendly soccer match on Wednesday.] 

German coach of Greece national soccer team Otto Rehagel gives a news conference in Heraklion, Crete, March 30, 2004. [Greece will play Switzerland in a friendly soccer match on Wednesday.] 

German coach of Greece national soccer team Otto Rehhagel gives a news conference in Heraklion, Crete, March 30, 2004. Greece will play Switzerland in a friendly soccer match on Wednesday. REUTERS/Pascal Lauener REUTERS PLA/CR/ 

German coach of Greece national soccer team Otto Rehhagel gives a news conference in Heraklion, Crete, March 30, 2004. Greece will play Switzerland in a friendly soccer match on Wednesday. REUTERS/Pascal Lauener REUTERS PLA/CR/ 

German coach of Greece national soccer team Otto Rehhagel gives a news conference in Heraklion, Crete, March 30, 2004. Greece will play Switzerland in a friendly soccer match on Wednesday. REUTERS/Pascal Lauener REUTERS PLA/CR/