U.S. Military Academy (USMA) cadets wear protective face masks as they fire live mortar shells from an artillery weapon during tactical and physical training activities as part of Cadet Summer Training at West Point, New York, U.S., August 7, 2020. REUTERS/Mike Segar

U.S. Military Academy (USMA) cadets wear protective face masks as they fire live mortar shells from an artillery weapon during tactical and physical training activities as part of Cadet Summer Training at West Point, New York, U.S., August 7, 2020. REUTERS/Mike Segar

U.S. Military Academy (USMA) cadets wear protective face masks as they fire live mortar shells from an artillery weapon during tactical and physical training activities as part of Cadet Summer Training at West Point, New York, U.S., August 7, 2020. REUTERS/Mike Segar

A builder trowel lies next to a pile of mortar on a new Barratt Homes housing development near Warrington, Britain, August 6, 2020. REUTERS/Phil Noble

Student Laila Lacy, 17, wears a mortar board with the message "Young, Black & Educated" at a drive-thru graduation ceremony at University High School amid the coronavirus disease (COVID-19) outbreak, in Los Angeles, California, U.S., June 12, 2020. REUTERS/Lucy Nicholson

Compton Early College High School graduating student Chelsea Donis adjust her mortar after picking up her diploma in a parking lot during a drive-thru graduating ceremony, during the outbreak of the coronavirus disease (COVID-19) in Compton, California U.S. June 10, 2020. REUTERS/Mario Anzuoni

Pasadena High School graduating students Alexis Farias and Rosie Gongora check their mortars before the official portrait at a drive-thru studio during the outbreak of the coronavirus disease (COVID-19), in Pasadena, California, U.S., May 8, 2020. REUTERS/Mario Anzuoni

Pasadena High School graduating student Joshua Dionisio is helped with his mortar before the official portrait at a drive-thru studio during the outbreak of the coronavirus disease (COVID-19), in Pasadena, California, U.S., May 8, 2020. REUTERS/Mario Anzuoni

A man mixes mortar as he repairs a bridge broken by flooding waters near the Rift Valley town of Mai Mahiu, Kenya November 27, 2019. REUTERS/Marius Bosch

A demonstrator bangs a mortar with a pestle during a protest rejecting the December presidential election in Algiers, Algeria November 21, 2019. REUTERS/Ramzi Boudina

A demonstrator carries a child as he bangs a mortar with a pestle during a protest rejecting the December presidential election in Algiers, Algeria November 21, 2019. REUTERS/Ramzi Boudina

A view shows the facade of a building after it was hit by mortar shells fired from Syria, in the Turkish border town of Akcakale in Sanliurfa province, Turkey, October 13, 2019. REUTERS/Stoyan Nenov

A man shouts outside of a building after it was hit by mortar shells fired from Syria, in the Turkish border town of Akcakale in Sanliurfa province, Turkey, October 13, 2019. REUTERS/Stoyan Nenov

A woman is taken out of a building after it was hit by mortar shells fired from Syria, in the Turkish border town of Akcakale in Sanliurfa province, Turkey, October 13, 2019. REUTERS/Stoyan Nenov

Police vehicle and an ambulance are seen outside of a building after it was hit by mortar shells fired from Syria, in the Turkish border town of Akcakale in Sanliurfa province, Turkey, October 13, 2019. REUTERS/Stoyan Nenov

A view shows the facade of a building after it was hit by mortar shells fired from Syria, in the Turkish border town of Akcakale in Sanliurfa province, Turkey, October 13, 2019. REUTERS/Stoyan Nenov

A woman is taken out of a building after it was hit by mortar shells fired from Syria, in the Turkish border town of Akcakale in Sanliurfa province, Turkey, October 13, 2019. REUTERS/Stoyan Nenov

A man shouts outside of a building after it was hit by mortar shells fired from Syria, in the Turkish border town of Akcakale in Sanliurfa province, Turkey, October 13, 2019. REUTERS/Stoyan Nenov

People shout slogans during the funeral ceremony of 9-month-old baby boy Mohammed Omar Saar, who was killed during mortar and rocket assault from Syria, in the border town of Akcakale in Sanliurfa province, Turkey, October 11, 2019. REUTERS/Kemal Aslan

People pray during the funeral ceremony of 9-month-old baby boy Mohammed Omar Saar, who was killed during mortar and rocket assault from Syria, in the border town of Akcakale in Sanliurfa province, Turkey, October 11, 2019. REUTERS/Kemal Aslan

Relatives of the 9-month-old baby boy Mohammed Omar Saar who was killed during a mortar and rocket assault from Syria, mourn at a funeral ceremony in the border town of Akcakale in Sanliurfa province, Turkey, October 11, 2019. REUTERS/Murad Sezer

Turkish police officers stand guard during the funeral ceremony of the 9-month-old baby boy Mohammed Omar Saar who was killed during a mortar and rocket assault from Syria, in the border town of Akcakale in Sanliurfa province, Turkey, October 11, 2019. REUTERS/Murad Sezer

Turkish police officers stand guard during the funeral ceremony of the 9-month-old baby boy Mohammed Omar Saar who was killed during a mortar and rocket assault from Syria, in the border town of Akcakale in Sanliurfa province, Turkey, October 11, 2019. REUTERS/Murad Sezer

Fatina, mother of the 9-month-old baby boy Mohammed Omar Saar who was killed during a mortar and rocket assault from Syria, mourns at a funeral ceremony in the border town of Akcakale in Sanliurfa province, Turkey, October 11, 2019. REUTERS/Murad Sezer

Relatives of the 9-month-old baby boy Mohammed Omar Saar who was killed during a mortar and rocket assault from Syria, mourn at a funeral ceremony in the border town of Akcakale in Sanliurfa province, Turkey, October 11, 2019. REUTERS/Murad Sezer

Fatina, mother of the 9-month-old baby boy Mohammed Omar Saar who was killed during a mortar and rocket assault from Syria, leaves from a cemetry following the funeral ceremony in the border town of Akcakale in Sanliurfa province, Turkey, October 11, 2019. REUTERS/Murad Sezer

Fatina, mother of the 9-month-old baby boy Mohammed Omar Saar who was killed during a mortar and rocket assault from Syria, mourns at a funeral ceremony in the border town of Akcakale in Sanliurfa province, Turkey, October 11, 2019. REUTERS/Murad Sezer

Mohammed Hani and his wife Fatina, parents of the 9-month-old baby boy Mohammed Omar Saar who was killed during a mortar and rocket assault from Syria, mourns during a funeral ceremony in the border town of Akcakale in Sanliurfa province, Turkey, October 11, 2019. REUTERS/Murad Sezer

Mohammed Hani, the father of 9-month-old baby boy Mohammed Omar Saar who was killed during a mortar and rocket assault from Syria, arrives at a funeral ceremony in the border town of Akcakale in Sanliurfa province, Turkey, October 11, 2019. REUTERS/Murad Sezer

Turkish flag-wrapped coffin of 9-month-old baby boy Mohammed Omar Saar, who was killed during a mortar and rocket assault from Syria, is pictured during a funeral ceremony in the border town of Akcakale in Sanliurfa province, Turkey, October 11, 2019. REUTERS/Murad Sezer

Men pray next to the Turkish flag-wrapped coffin of 9-month-old baby boy Mohammed Omar Saar, who was killed during a mortar and rocket assault from Syria, during a funeral ceremony in the border town of Akcakale in Sanliurfa province, Turkey, October 11, 2019. REUTERS/Murad Sezer

A boy stands next to the Turkish flag-wrapped coffin of 9-month-old baby boy Mohammed Omar Saar, who was killed during a mortar and rocket assault from Syria, during a funeral ceremony in the border town of Akcakale in Sanliurfa province, Turkey, October 11, 2019. REUTERS/Murad Sezer

People carry the Turkish flag-wrapped coffin of 9-month-old baby boy Mohammed Omar Saar, who was killed during a mortar and rocket assault from Syria, during a funeral ceremony in the border town of Akcakale in Sanliurfa province, Turkey, October 11, 2019. REUTERS/Murad Sezer TPX IMAGES OF THE DAY

People carry the Turkish flag-wrapped coffin of 9-month-old baby boy Mohammed Omar Saar, who was killed during a mortar and rocket assault from Syria, during a funeral ceremony in the border town of Akcakale in Sanliurfa province, Turkey, October 11, 2019. REUTERS/Murad Sezer

People offer their Friday prayers in front of the Turkish flag-wrapped coffin of 9-month-old baby boy Mohammed Omar Saar, who was killed during a mortar and rocket assault from Syria, during a funeral ceremony in the border town of Akcakale in Sanliurfa province, Turkey, October 11, 2019. REUTERS/Murad Sezer

People carry the Turkish flag-wrapped coffin of 9-month-old baby boy Mohammed Omar Saar, who was killed during a mortar and rocket assault from Syria, during a funeral ceremony in the border town of Akcakale in Sanliurfa province, Turkey, October 11, 2019. REUTERS/Murad Sezer

A damaged window is seen after the Education Ministry's local office hit by mortar shells fired from Syria, in the Turkish border town of Akcakale, Sanliurfa province, Turkey, October 10, 2019. REUTERS/Murad Sezer

People leave the building after the Education Ministry's local office hit by mortar shells fired from Syria, in the Turkish border town of Akcakale, Sanliurfa province, Turkey, October 10, 2019. REUTERS/Murad Sezer

Police officers try to keep people stay away from the Akcakale Government House after it was hit by mortar shells fired from Syria, in the Turkish border town of Akcakale, Sanliurfa province, Turkey, October 10, 2019. REUTERS/Murad Sezer

An ambulance and a fire truck arrive at the Akcakale Government House after it was hit by mortar shells fired from Syria, in the Turkish border town of Akcakale, Sanliurfa province, Turkey, October 10, 2019. REUTERS/Murad Sezer

Members of police special forces secure the are outside the Akcakale Govenrment House after it was hit by mortar shells fired from Syria, in the Turkish border town of Akcakale, Sanliurfa province, Turkey, October 10, 2019. REUTERS/Murad Sezer

Police officers stand outside the Akcakale Govenrment House after it was hit by mortar shells fired from Syria, in the Turkish border town of Akcakale, Sanliurfa province, Turkey, October 10, 2019. REUTERS/Murad Sezer

A police officer stands guard outside the Akcakale Govenrment House after it was hit by mortar shells fired from Syria, in the Turkish border town of Akcakale, Sanliurfa province, Turkey, October 10, 2019. REUTERS/Murad Sezer

Latvian Army's GrW 86 mortar fires during NATO enhanced Forward Presence battle group military exercise Silver Arrow in Adazi, Latvia October 5, 2019. REUTERS/Ints Kalnins

Spanish Navy marines prepare mortars to fire during Baltops 2019 NATO military exercise in Adazi, Latvia June 13, 2019. REUTERS/Ints Kalnins

Spanish Navy marine fires mortar during Baltops 2019 NATO military exercise in Adazi, Latvia June 13, 2019. REUTERS/Ints Kalnins

A man is seen reflected in a mirror inside the Amazon-backed pop up store 'Clicks and Mortar' in Manchester, Britain, June 3, 2019. REUTERS/Phil Noble

People are seen inside the Amazon-backed pop up store 'Clicks and Mortar' in Manchester, Britain, June 3, 2019. REUTERS/Phil Noble

People look at 'Swifty scooters' for sale inside the Amazon-backed pop up store 'Clicks and Mortar' in Manchester, Britain, June 3, 2019. REUTERS/Phil Noble

People are seen inside the Amazon-backed pop up store 'Clicks and Mortar' in Manchester, Britain, June 3, 2019. REUTERS/Phil Noble

Small businesses are seen inside the Amazon-backed pop up store 'Clicks and Mortar' in Manchester, Britain, June 3, 2019. REUTERS/Phil Noble

A man walks past the Amazon-backed pop up store 'Clicks and Mortar' in Manchester, Britain, June 3, 2019. REUTERS/Phil Noble

A man walks past the Amazon-backed pop up store 'Clicks and Mortar' in Manchester, Britain, June 3, 2019. REUTERS/Phil Noble

An Amazon collection locker is seen inside the Amazon-backed pop up store 'Clicks and Mortar' in Manchester, Britain, June 3, 2019. REUTERS/Phil Noble

An Amazon collection locker is seen inside the Amazon-backed pop up store 'Clicks and Mortar' in Manchester, Britain, June 3, 2019. REUTERS/Phil Noble

A damaged wall of a mosque is seen after forces loyal to Khalifa Haftar fired a mortar shell in Wadi Rabiya neighbourhood at outskirts of Tripoli, Libya May 28, 2019. REUTERS/Goran Tomasevic

A fighter loyal to Libya's U.N.-backed government (GNA) fires a mortar during clashes with forces loyal to Khalifa Haftar on the outskirts of Tripoli, Libya May 25, 2019. REUTERS/Goran Tomasevic

A student's message about abortion is pictured on a mortar board hat during commencement at the Mailman School of Public Health at Columbia University in the Manhattan borough of New York, New York, U.S., May 21, 2019. REUTERS/Carlo Allegri

A student's message about abortion is pictured on a mortar board hat during commencement at the Mailman School of Public Health at Columbia University in the Manhattan borough of New York, New York, U.S., May 21, 2019. REUTERS/Carlo Allegri

A student's message about abortion is pictured on a mortar board hat during commencement at the Mailman School of Public Health at Columbia University in the Manhattan borough of New York, New York, U.S., May 21, 2019. REUTERS/Carlo Allegri