Sikh devotees attend a religious procession to mark the 550th birth anniversary of Guru Nanak Dev Ji, founder of Sikhism, in Nankana Sahib near Lahore, Pakistan November 12, 2019. REUTERS/Mohsin Raza

Sikhs from India look at the inaugural foundation plaque near the shrine of Guru Nanak Dev Ji, founder of Sikhism, during the groundbreaking ceremony of the Kartarpur border corridor, which will officially open next year, in Kartarpur, Pakistan November 28, 2018. REUTERS/Mohsin Raza

A man serves food to Sikhs from India outside the shrine of Guru Nanak Dev Ji, founder of Sikhism, during the groundbreaking ceremony of the Kartarpur border corridor, which will officially open next year, in Kartarpur, Pakistan November 28, 2018. REUTERS/Mohsin Raza

Sikh devotees attend a religious procession to mark the 549th birth anniversary of Guru Nanak Dev Ji, founder of Sikhism, in Nankana Sahib near Lahore, Pakistan, November 23, 2018. REUTERS/Mohsin Raza

A Sikh devotee attends a religious procession to mark the 549th birth anniversary of Guru Nanak Dev Ji, founder of Sikhism, in Nankana Sahib near Lahore, Pakistan, November 23, 2018. REUTERS/Mohsin Raza

Followers of Sikhism perform Sikh martial arts at the Annual Sikh Day Parade in Lisbon, Portugal April 29, 2018. REUTERS/Rafael Marchante

A follower of Sikhism performs Sikh martial arts at the Annual Sikh Day Parade in Lisbon, Portugal April 29, 2018. REUTERS/Rafael Marchante

Followers of Sikhism perform Sikh martial arts at the Annual Sikh Day Parade in Lisbon, Portugal April 29, 2018. REUTERS/Rafael Marchante

Followers of Sikhism perform Sikh martial arts at the Annual Sikh Day Parade in Lisbon, Portugal April 29, 2018. REUTERS/Rafael Marchante

A follower of Sikhism waits for a Sikh martial arts exhibition at the Annual Sikh Day Parade in Lisbon, Portugal April 29, 2018. REUTERS/Rafael Marchante

Followers of Sikhism perform Sikh martial arts at the Annual Sikh Day Parade in Lisbon, Portugal April 29, 2018. REUTERS/Rafael Marchante

A follower of Sikhism performs Sikh martial arts at the Annual Sikh Day Parade in Lisbon, Portugal April 29, 2018. REUTERS/Rafael Marchante

Followers of Sikhism prepare free meals to hand out to participants at the Annual Sikh Day Parade in Manhattan, New York, U.S., April 28, 2018. REUTERS/Gaia Squarci

Followers of Sikhism prepare free meals to hand out to participants at the Annual Sikh Day Parade in Manhattan, New York, U.S., April 28, 2018. REUTERS/Gaia Squarci

Followers of Sikhism chant hymns at the Annual Sikh Day Parade in Manhattan, New York, U.S., April 28, 2018. REUTERS/Gaia Squarci

Participants receive offerings of nuts from followers of Sikhism on a float during the Annual Sikh Day Parade in Manhattan, New York, U.S., April 28, 2018. REUTERS/Gaia Squarci

A follower of Sikhism on a float takes part in the Annual Sikh Day Parade in Manhattan, New York, U.S., April 28, 2018. REUTERS/Gaia Squarci

A participant (R) receives from a follower of Sikhism an offering of nuts during the Annual Sikh Day Parade in Manhattan, New York, U.S., April 28, 2018. REUTERS/Gaia Squarci

A follower of Sikhism on a float takes part in the Annual Sikh Day Parade in Manhattan, and NYPD police watches over. New York, U.S., April 28, 2018. REUTERS/Gaia Squarci

Followers of Sikhism perform Sikh martial arts at the Annual Sikh Day Parade in Manhattan, New York, U.S., April 28, 2018. REUTERS/Gaia Squarci

Followers of Sikhism perform Sikh martial arts at the Annual Sikh Day Parade in Manhattan, New York, U.S., April 28, 2018. REUTERS/Gaia Squarci

A follower of Sikhism plays music for prayers at the Sikh Cultural Society in Queens ahead of the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Followers of Sikhism pray at the the Sikh Cultural Society in Queens ahead of the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

A follower of Sikhism makes eye contact with the camera sitting at the Sikh Cultural Society ahead of the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

A follower of Sikhism prays at the the Sikh Cultural Society ahead of the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Followers of Sikhism are photographed at the Sikh Cultural Society during the preparation of vegetarian food to be served at the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

A follower of Sikhism organizes clean pots in the communal kitchen on the Sikh Cultural Society during the preparation of vegetarian food to be served at the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

A follower of Sikhism is photographed in the communal kitchen of the Sikh Cultural Society during the preparation of vegetarian food to be served at the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

A follower of Sikhism sits after eating at the Sikh Cultural Society ahead of the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Followers of Sikhism make eye contact with the camera while watching friends train in martial arts demonstrations at the Sikh Cultural Society ahead of the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Followers of Sikhism train for martial arts demonstrations at the Sikh Cultural Society ahead of the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Followers of Sikhism train for martial arts demonstrations at the Sikh Cultural Society ahead of the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Followers of Sikhism train for martial arts demonstrations at the Sikh Cultural Society ahead of the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Follower of Sikhism Barstan Singh poses for a portrait in the communal kitchen of the Sikh Cultural Society during the preparation of vegetarian food to be served at the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Follower of Sikhism Barstan Singh poses for a portrait in the communal kitchen of the Sikh Cultural Society during the preparation of vegetarian food to be served at the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

A follower of Sikhism swipes the floor at the Sikh Cultural Society in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Followers of Sikhism prepare vegetarian food to be served at the Annual Sikh Day Parade, at the Sikh Cultural Society in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Followers of Sikhism prepare vegetarian food to be served at the Annual Sikh Day Parade, at the Sikh Cultural Society in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Followers of Sikhism prepare vegetarian food to be served at the Annual Sikh Day Parade, at the Sikh Cultural Society in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Followers of Sikhism prepare vegetarian food to be served at the Annual Sikh Day Parade, at the Sikh Cultural Society in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Followers of Sikhism prepare vegetarian food to be served at the Annual Sikh Day Parade, at the Sikh Cultural Society in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

A child plays with a cellphone as followers of Sikhism pray at the the Sikh Cultural Society ahead of the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Followers of Sikhism pray at the the Sikh Cultural Society ahead of the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Followers of Sikhism pray at the the Sikh Cultural Society ahead of the Annual Sikh Day Parade, in in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

A follower of Sikhism prays as another one sleeps at the the Sikh Cultural Society ahead of the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Follower of Sikhism Simarpreet Kaur poses for a portrait at the Sikh Cultural Society ahead of the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

A follower of Sikhism puts her shoes on before leaving the Sikh Cultural Society in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Followers of Sikhism pray at the the Sikh Cultural Society ahead of the Annual Sikh Day Parade, in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Shoes belonging to followers of Sikhism are seen at the entrance of the Sikh Cultural Society in Queens, New York, U.S., April 27, 2018. Picture taken April 27, 2018. REUTERS/Gaia Squarci

Indian Sikh pilgrim waves from a window of a train as he arrives at the Wagah border railway station to attend the 548th birth celebrations of Sikhism founder Guru Nanak Dev Ji in Lahore, Pakistan November 2, 2017. REUTERS/Mohsin Raza

Gursewak Singh serves food to worshippers after prayers given by his father at a Sikh temple in Tokyo, Japan, August 21, 2016. Picture taken on August 21, 2016. To match Special Report JAPAN-DETENTION/CHILDREN REUTERS/Thomas Wilson

Sikh women pray near the offerings inside a Gurudwara or a Sikh temple on the occasion of the 547th birth anniversary of Guru Nanak Dev, the first Sikh Guru and founder of Sikhism, in Jammu, India, November 14, 2016. REUTERS/Mukesh Gupta

Offerings are pictured inside a Gurudwara or a Sikh temple on the occasion of the 547th birth anniversary of Guru Nanak Dev, the first Sikh Guru and founder of Sikhism, in Chandigarh, India, November 14, 2016. REUTERS/Ajay Verma

Afghan Hindu and Sikh families wait for lunch inside a Gurudwara, or a Sikh temple, during a religious ceremony in Kabul, Afghanistan June 8, 2016. REUTERS/Mohammad Ismail

An Afghan Sikh man drinks from a cup inside a Gurudwara, or a Sikh temple, during a religious ceremony in Kabul, Afghanistan June 8, 2016. REUTERS/Mohammad Ismail TPX IMAGES OF THE DAY

Afghan Sikh Jagtar Singh Laghmani, 50, sits at his traditional herb shop in Kabul, Afghanistan June 19, 2016. REUTERS/Mohammad Ismail

An Afghan Hindu woman arrives for a religious ceremony inside a Gurudwara, or a Sikh temple, in Kabul, Afghanistan June 8, 2016. REUTERS/Mohammad Ismail

An Afghan Sikh holds his child inside a Gurudwara, or a Sikh temple, during a religious ceremony in Kabul, Afghanistan June 8, 2016. REUTERS/Mohammad Ismail

Afghan Sikh Jagtar Singh Laghmani, 50, accepts money from a customer at his traditional herb shop in Kabul, Afghanistan June 19, 2016. REUTERS/Mohammad Ismail

An Afghan Sikh woman prays inside a Gurudwara, or a Sikh temple, during a religious ceremony in Kabul, Afghanistan June 8, 2016. REUTERS/Mohammad Ismail