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Turkish residents of the Netherlands gather for a protest in Rotterdam on March 11, 2017. Protests erupted in the Dutch port city of Rotterdam late on March 11 outside the Turkish consulate amid a row with Ankara after Dutch authorities banned the visits of Turkish ministers. About 1,000 people waving Turkish flags gathered on the street leading to the consulate, as tensions rocketed over rallies abroad to help Ankara gain backing for an April referendum vote. / AFP PHOTO / Emmanuel DUNAND (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)

Turkish residents of the Netherlands gather for a protest in Rotterdam on March 11, 2017. 
Protests erupted in the Dutch port city of Rotterdam late on March 11 outside the Turkish consulate amid a row with Ankara after Dutch authorities banned the visits of Turkish ministers. About 1,000 people waving Turkish flags gathered on the street leading to the consulate, as tensions rocketed over rallies abroad to help Ankara gain backing for an April referendum vote.
 / AFP PHOTO / Emmanuel DUNAND        (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)

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Police officers face Turkish residents of the Netherlands gathered for a protest outside Turkey's consulate in Rotterdam on March 11, 2017. Protests erupted in the Dutch port city of Rotterdam late on March 11 outside the Turkish consulate amid a row with Ankara after Dutch authorities banned the visits of Turkish ministers. About 1,000 people waving Turkish flags gathered on the street leading to the consulate, as tensions rocketed over rallies abroad to help Ankara gain backing for an April referendum vote. / AFP PHOTO / Emmanuel DUNAND (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)

Police officers face Turkish residents of the Netherlands gathered for a protest outside Turkey's consulate in Rotterdam on March 11, 2017. 
Protests erupted in the Dutch port city of Rotterdam late on March 11 outside the Turkish consulate amid a row with Ankara after Dutch authorities banned the visits of Turkish ministers. About 1,000 people waving Turkish flags gathered on the street leading to the consulate, as tensions rocketed over rallies abroad to help Ankara gain backing for an April referendum vote.
 / AFP PHOTO / Emmanuel DUNAND        (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)

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People gesture and wave flags as Turkish residents of the Netherlands gather for a protest outside Turkey's consulate in Rotterdam on March 11, 2017. Protests erupted in the Dutch port city of Rotterdam late on March 11 outside the Turkish consulate amid a row with Ankara after Dutch authorities banned the visits of Turkish ministers. About 1,000 people waving Turkish flags gathered on the street leading to the consulate, as tensions rocketed over rallies abroad to help Ankara gain backing for an April referendum vote. / AFP PHOTO / Emmanuel DUNAND (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)

People gesture and wave flags as Turkish residents of the Netherlands gather for a protest outside Turkey's consulate in Rotterdam on March 11, 2017. 
Protests erupted in the Dutch port city of Rotterdam late on March 11 outside the Turkish consulate amid a row with Ankara after Dutch authorities banned the visits of Turkish ministers. About 1,000 people waving Turkish flags gathered on the street leading to the consulate, as tensions rocketed over rallies abroad to help Ankara gain backing for an April referendum vote.
 / AFP PHOTO / Emmanuel DUNAND        (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)

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Turkish residents of the Netherlands gather for a protest outside Turkey's consulate in Rotterdam on March 11, 2017. Protests erupted in the Dutch port city of Rotterdam late on March 11 outside the Turkish consulate amid a row with Ankara after Dutch authorities banned the visits of Turkish ministers. About 1,000 people waving Turkish flags gathered on the street leading to the consulate, as tensions rocketed over rallies abroad to help Ankara gain backing for an April referendum vote. / AFP PHOTO / Emmanuel DUNAND (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)

Turkish residents of the Netherlands gather for a protest outside Turkey's consulate in Rotterdam on March 11, 2017. 
Protests erupted in the Dutch port city of Rotterdam late on March 11 outside the Turkish consulate amid a row with Ankara after Dutch authorities banned the visits of Turkish ministers. About 1,000 people waving Turkish flags gathered on the street leading to the consulate, as tensions rocketed over rallies abroad to help Ankara gain backing for an April referendum vote.
 / AFP PHOTO / Emmanuel DUNAND        (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)

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The Turkish ambassador to the Netherlands (2nd-L) addresses Turkish residents of the Netherlands gathered for a protest outside Turkey's consulate in Rotterdam on March 11, 2017. Protests erupted in the Dutch port city of Rotterdam late on March 11 outside the Turkish consulate amid a row with Ankara after Dutch authorities banned the visits of Turkish ministers. About 1,000 people waving Turkish flags gathered on the street leading to the consulate, as tensions rocketed over rallies abroad to help Ankara gain backing for an April referendum vote. / AFP PHOTO / Emmanuel DUNAND (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)

The Turkish ambassador to the Netherlands (2nd-L) addresses Turkish residents of the Netherlands gathered for a protest outside Turkey's consulate in Rotterdam on March 11, 2017. 
Protests erupted in the Dutch port city of Rotterdam late on March 11 outside the Turkish consulate amid a row with Ankara after Dutch authorities banned the visits of Turkish ministers. About 1,000 people waving Turkish flags gathered on the street leading to the consulate, as tensions rocketed over rallies abroad to help Ankara gain backing for an April referendum vote.
 / AFP PHOTO / Emmanuel DUNAND        (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)