Jewish worshippers take part in Slichot, a prayer in which Jews offer repentance and ask God to forgive their sins, ahead of Yom Kippur, at the Western Wall in Jerusalem's Old City September 16, 2018. Picture taken September 16, 2018. REUTERS/Ammar Awad 

A stone that fell off the Western Wall in Jerusalem can be seen near the wall in Jerusalem's Old City, July 23, 2018. REUTERS/ Nir Elias 

A stone that fell off the Western Wall in Jerusalem can be seen near the wall in Jerusalem's Old City, July 23, 2018. REUTERS/ Nir Elias 

A stone that fell off the Western Wall in Jerusalem can be seen near the wall in Jerusalem's Old City, July 23, 2018. REUTERS/ Nir Elias 

A man looks at a stone that fell off the Western Wall in Jerusalem's Old City, July 23, 2018. REUTERS/ Nir Elias 

Jewish worshippers wrapped in prayer shawls participate in the priestly blessing prayer on the holiday of Passover, at the Western Wall in Jerusalem's Old City, April 2, 2018. REUTERS/Ronen Zvulun 

Jewish worshippers wrapped in prayer shawls participate in the priestly blessing prayer on the holiday of Passover, at the Western Wall in Jerusalem's Old City, April 2, 2018. REUTERS/Ronen Zvulun 

Jewish worshippers are seen from above during the priestly blessing prayer on the holiday of Passover, at the Western Wall in Jerusalem's Old City, April 2, 2018. REUTERS/Ronen Zvulun 

Jewish worshippers cover themselves in prayer shawls during the priestly blessing prayer on the holiday of Passover at the Western Wall in Jerusalem's Old City April 13, 2017. REUTERS/Amir Cohen 

Jewish worshippers are seen from above during the priestly blessing prayer on the holiday of Passover, at the Western Wall in Jerusalem's Old City April 13, 2017. REUTERS/Amir Cohen 

Jewish worshippers take part in the priestly blessing prayer on the holiday of Passover, at the Western Wall in Jerusalem's Old City April 13, 2017. REUTERS/Amir Cohen 

Jewish worshippers are seen from above during the priestly blessing prayer on the holiday of Passover at the Western Wall in Jerusalem's Old City April 13, 2017. REUTERS/Amir Cohen 

Jewish worshippers are seen from above during the priestly blessing prayer on the holiday of Passover, at the Western Wall in Jerusalem's Old City April 13, 2017. REUTERS/Amir Cohen TPX IMAGES OF THE DAY 

Russia's Prime Minister Dmitry Medvedev touches the stones during a visit to the Western Wall in Jerusalem November 10, 2016. REUTERS/Dan Balilty/Pool 

Russia's Prime Minister Dmitry Medvedev touches the stones during a visit to the Western Wall in Jerusalem November 10, 2016. REUTERS/Dan Balilty/Pool 

Russia's Prime Minister Dmitry Medvedev touches the stones during a visit to the Western Wall in Jerusalem November 10, 2016. REUTERS/Dan Balilty/Pool 

A Jewish worshipper holds up a torah scroll during a mass prayer at the Western Wall in Jerusalem's Old City during the Jewish holiday of Sukkot October 19, 2016. REUTERS/Baz Ratner 

Jewish worshippers cover themselves in prayer shawls as they recite the priestly blessing at the Western Wall in Jerusalem's Old City during the Jewish holiday of Sukkot October 19, 2016. REUTERS/Baz Ratner 

Jewish worshippers cover themselves in prayer shawls as they recite the priestly blessing at the Western Wall in Jerusalem's Old City during the Jewish holiday of Sukkot October 19, 2016. REUTERS/Baz Ratner 

Jewish worshippers cover themselves in prayer shawls as they recite the priestly blessing at the Western Wall in Jerusalem's Old City during the Jewish holiday of Sukkot October 19, 2016. REUTERS/Baz Ratner 

A Jewish worshipper (L) holds the Four Species, used in rituals during the Jewish holiday of Sukkot, as others are reflected in a window during a mass prayer at the Western Wall in Jerusalem's Old City October 19, 2016. REUTERS/Baz Ratner 

Jewish worshippers cover themselves in prayer shawls as they recite the priestly blessing at the Western Wall in Jerusalem's Old City during the Jewish holiday of Sukkot October 19, 2016. REUTERS/Baz Ratner 

Jewish worshippers cover themselves in prayer shawls as they recite the priestly blessing at the Western Wall in Jerusalem's Old City during the Jewish holiday of Sukkot October 19, 2016. REUTERS/Baz Ratner 

A Jewish worshipper uses his mobile phone to record worshippers who are covered in prayer shawls as they recite the priestly blessing at the Western Wall in Jerusalem's Old City during the Jewish holiday of Sukkot October 19, 2016. REUTERS/Baz Ratner TPX IMAGES OF THE DAY

A young Jewish worshipper covers himself in a prayer shawl as he takes part in the priestly blessing at the Western Wall in Jerusalem's Old City during the Jewish holiday of Sukkot October 19, 2016. REUTERS/Baz Ratner 

A Jewish worshipper holds a religious script against the stones of the Western Wall as he takes part in a mass prayer in Jerusalem's Old City during the Jewish holiday of Sukkot October 19, 2016. REUTERS/Baz Ratner 

New York City Mayor Bill de Blasio (C) visits the Western Wall in Jerusalem's Old City October 18, 2015. REUTERS/Amir Cohen 

New York City Mayor Bill de Blasio (2nd R) visits the Western Wall in Jerusalem's Old City October 18, 2015. REUTERS/Amir Cohen 

New York City Mayor Bill de Blasio (L) waves after visiting the Western Wall in Jerusalem's Old City October 18, 2015. REUTERS/Amir Cohen 

New York City Mayor Bill de Blasio places a note in the Western Wall during a visit in Jerusalem's Old City October 18, 2015. REUTERS/Amir Cohen 

New York City Mayor Bill de Blasio touches the Western Wall during a visit in Jerusalem's Old City October 18, 2015. REUTERS/Amir Cohen TPX IMAGES OF THE DAY

New York City Mayor Bill de Blasio touches the Western Wall during a visit in Jerusalem's Old City October 18, 2015. REUTERS/Amir Cohen 

Jerry Aaronson (C) a member of a First Nations Organisation touches the stones of the Western Wall in Jerusalem's Old City, September 13, 2015. REUTERS/Baz Ratner 

Jerry Aaronson (3rd L), a member of a First Nations Organisation, touches the stones of the Western Wall, Judaism's holiest prayer site in Jerusalem's Old City, September 13, 2015. REUTERS/Baz Ratner 

A member of a First Nations Organisation (C) touches the stones of the Western Wall, Judaism's holiest prayer site in Jerusalem's Old City, September 13, 2015. REUTERS/Baz Ratner 

A member of a First Nations Organisation (C) touches the stones of the Western Wall, Judaism's holiest prayer site in Jerusalem's Old City, September 13, 2015. REUTERS/Baz Ratner 

Workers remove notes from the cracks of the Western Wall, Judaism's holiest prayer site, in Jerusalem's Old City, September 9, 2015. Workers on Wednesday cleaned out the cracks and made room for more paper notes that Jews believe are notes to God, ahead of the Jewish New Year that starts on September 12. REUTERS/Ammar Awad 

Workers remove notes from the cracks of the Western Wall, Judaism's holiest prayer site, in Jerusalem's Old City, September 9, 2015. Workers on Wednesday cleaned out the cracks and made room for more paper notes that Jews believe are notes to God, ahead of the Jewish New Year that starts on September 12. REUTERS/Ammar Awad 

Workers remove notes from the cracks of the Western Wall, Judaism's holiest prayer site, in Jerusalem's Old City, September 9, 2015. Workers on Wednesday cleaned out the cracks and made room for more paper notes that Jews believe are notes to God, ahead of the Jewish New Year that starts on September 12. REUTERS/Ammar Awad 

Workers remove notes from the cracks of the Western Wall, Judaism's holiest prayer site, in Jerusalem's Old City, September 9, 2015. Workers on Wednesday cleaned out the cracks and made room for more paper notes that Jews believe are notes to God, ahead of the Jewish New Year that starts on September 12. REUTERS/Ammar Awad 

A worker removes notes from the cracks of the Western Wall, Judaism's holiest prayer site, in Jerusalem's Old City, September 9, 2015. Workers on Wednesday cleaned out the cracks and made room for more paper notes that Jews believe are notes to God, ahead of the Jewish New Year that starts on September 12. REUTERS/Ammar Awad 

A Jewish worshipper touches the stones of the Western Wall, during a special priestly blessing for Passover at the Western Wall, Judaism's holiest prayer site, in Jerusalem's Old City April 6, 2015. REUTERS/Ronen Zvulun

A man prays (R) besides another man who removes notes from the cracks of the Western Wall, Judaism's holiest prayer site, in Jerusalem's Old City March 25, 2015. Workers on Wednesday cleaned out the cracks and made room for more paper notes that Jews believe are notes to God, ahead of the Jewish holiday of Passover which begins on April 3. REUTERS/Nir Elias

A man removes notes from the cracks of the Western Wall, Judaism's holiest prayer site, in Jerusalem's Old City March 25, 2015. Workers on Wednesday cleaned out the cracks and made room for more paper notes that Jews believe are notes to God, ahead of the Jewish holiday of Passover which begins on April 3. REUTERS/Nir Elias

Notes are seen on the ground after they were removed from the cracks of the Western Wall, Judaism's holiest prayer site, in Jerusalem's Old City March 25, 2015. Workers on Wednesday cleaned out the cracks and made room for more paper notes that Jews believe are notes to God, ahead of the Jewish holiday of Passover which begins on April 3. REUTERS/Nir Elias

Children dressed in costumes visit the Western Wall, Judaism's holiest prayer site, during the Jewish holiday of Purim in Jerusalem's Old City March 6, 2015. Purim is a celebration of the Jews' salvation from genocide in ancient Persia, as recounted in the Book of Esther. REUTERS/Ammar Awad (JERUSALEM - Tags: RELIGION TPX IMAGES OF THE DAY) 

Israel's Prime Minister Benjamin Netanyahu touches the Western Wall, Judaism's holiest prayer site, during a visit in Jerusalem's Old City February 28, 2015. REUTERS/Marc Sellem/Pool (JERUSALEM - Tags: POLITICS RELIGION TRAVEL TPX IMAGES OF THE DAY) 

A Jewish worshipper enters a prayer room at the Western Wall in Jerusalem's Old city after snowfall January 8, 2015. A storm buffeted the Middle East with blizzards, rain and strong winds on Wednesday, keeping people at home across the region. The storm is forecast to last several days, threatening further disruption in Lebanon, Syria, Turkey, Jordan, Israel, the West Bank and the Gaza Strip, which have all been affected. REUTERS/Ronen Zvulun (JERUSALEM - Tags: ENVIRONMENT SOCIETY) 

A Jewish worshipper holds the four species, used in rituals for the holiday of Sukkot which began last week, during the recitation of the priestly blessing at the Western Wall in Jerusalem's Old City October 12, 2014. REUTERS/Baz Ratner (JERUSALEM - Tags: RELIGION) 

Jewish worshippers take part in Slichot, a prayer in which Jews offer repentance and ask God to forgive their sins, at the Western Wall, Judaism's holiest prayer site, ahead of Yom Kippur in Jerusalem's Old City October 2, 2014. Yom Kippur is the Jewish Day of Atonement which starts at sundown Friday. It is the holiest of Jewish holidays when observant Jews atone for the sins of the past year. REUTERS/Baz Ratner (JERUSALEM - Tags: RELIGION) 

Jewish worshippers take part in Slichot, a prayer in which Jews offer repentance and ask God to forgive their sins, at the Western Wall, Judaism's holiest prayer site, ahead of Yom Kippur in Jerusalem's Old City October 2, 2014. Yom Kippur is the Jewish Day of Atonement which starts at sundown Friday. It is the holiest of Jewish holidays when observant Jews atone for the sins of the past year. REUTERS/Baz Ratner (JERUSALEM - Tags: RELIGION) 

A Jewish worshipper takes part in Slichot, a prayer in which Jews offer repentance and ask God to forgive their sins, at the Western Wall, Judaism's holiest prayer site, ahead of Yom Kippur in Jerusalem's Old City October 2, 2014. Yom Kippur is the Jewish Day of Atonement which starts at sundown Friday. It is the holiest of Jewish holidays when observant Jews atone for the sins of the past year. REUTERS/Baz Ratner (JERUSALEM - Tags: RELIGION TPX IMAGES OF THE DAY) 

Western Wall Rabbi Shmuel Rabinowitz (2nd R) and workers remove notes from the cracks of the Western Wall, Judaism's holiest prayer site, in Jerusalem's Old City September 17, 2014. Workers on Wednesday cleaned out the cracks and made room for more paper notes that Jews believe are notes to God, ahead of Rosh Hashanah, the Jewish New Year, which starts at sundown on September 24. REUTERS/Ammar Awad (JERUSALEM - Tags: RELIGION TPX IMAGES OF THE DAY) 

Israelis take part in a mass prayer at the Western Wall, Judaism's holiest prayer site, in Jerusalem's Old City, for the return of three teenagers who were abducted June 15, 2014. Israel said on Sunday that Hamas militants had abducted three Israeli teenagers in the occupied West Bank, warning of "serious consequences" as it pressed on with a search and detained dozens of Palestinians. REUTERS/Ronen Zvulun (JERUSALEM - Tags: POLITICS CIVIL UNREST RELIGION) 

Israelis take part in a mass prayer at the Western Wall, Judaism's holiest prayer site, in Jerusalem's Old City, for the return of three teenagers who were abducted June 15, 2014. Israel said on Sunday that Hamas militants had abducted three Israeli teenagers in the occupied West Bank, warning of "serious consequences" as it pressed on with a search and detained dozens of Palestinians. REUTERS/Ronen Zvulun (JERUSALEM - Tags: POLITICS CIVIL UNREST RELIGION) 

Israeli women take part in a mass prayer at the Western Wall, Judaism's holiest prayer site, in Jerusalem's Old City, for the return of three teenagers who were abducted June 15, 2014. Israel said on Sunday that Hamas militants had abducted three Israeli teenagers in the occupied West Bank, warning of "serious consequences" as it pressed on with a search and detained dozens of Palestinians. REUTERS/Ronen Zvulun (JERUSALEM - Tags: POLITICS CIVIL UNREST RELIGION) 

Israelis take part in a mass prayer at the Western Wall, Judaism's holiest prayer site, in Jerusalem's Old City, for the return of three teenagers who were abducted June 15, 2014. Israel said on Sunday that Hamas militants had abducted three Israeli teenagers in the occupied West Bank, warning of "serious consequences" as it pressed on with a search and detained dozens of Palestinians. REUTERS/Ronen Zvulun (JERUSALEM - Tags: POLITICS CIVIL UNREST RELIGION TPX IMAGES OF THE DAY) 

Pope Francis touches the stones of the Western Wall, Judaism's holiest prayer site, in Jerusalem's Old City May 26, 2014. Francis completes a tour of the Holy Land on Monday, paying homage to Jews killed in the Nazi Holocaust and looking to affirm Christian rights at a disputed place of worship in Jerusalem. REUTERS/Andrew Medichini/Pool (JERUSALEM - Tags: POLITICS RELIGION TPX IMAGES OF THE DAY) 

Israelis gather at the Western Wall during celebrations marking Israel's 66th Independence Day in Jerusalem May 5, 2014. REUTERS/Amir Cohen (JERUSALEM - Tags: POLITICS ANNIVERSARY)