An advertisement for paintball is seen placed at an old house near the town of Cetinje, Montenegro, April 13, 2018. Picture taken April 13, 2018. REUTERS/Marko Djurica

David Greenbaum, manager of Ein Gedi nature reserve, holds a paintball rifle during a late-night patrol to distance wolves in Ein Gedi nature reserve, near the Dead Sea, Israel September 27, 2017. Picture taken September 27, 2017. REUTERS/Ronen Zvulun

David Greenbaum, manager of Ein Gedi Nature Reserve, holds a paintball rifle during a late-night patrol to distance wolves in Ein Gedi Nature Reserve, near the Dead Sea, Israel September 27, 2017. Picture taken September 27, 2017. REUTERS/Ronen Zvulun

Israeli children play paintball in the Jewish settlement outpost of Amona in the West Bank, December 9, 2016 REUTERS/Amir Cohen

A worker rides a lift past racks of vertical farming beds lit with light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures to grow a variety of baby greens at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. REUTERS/Mike Segar/File Photo GLOBAL BUSINESS WEEK AHEAD PACKAGE Ð SEARCH ÒBUSINESS WEEK AHEAD 5 SEPTEMBERÓ FOR ALL IMAGES

Israeli soldiers from the Nahal Infantry Brigade use paintball guns during an urban warfare training in the West Bank Jewish settlement of Alei Zahav, near Ariel July 13, 2016. REUTERS/Baz Ratner

Israeli soldiers from the Nahal Infantry Brigade use paintball guns during an urban warfare training in the West Bank Jewish settlement of Alei Zahav, near Ariel July 13, 2016. REUTERS/Baz Ratner

Israeli soldiers from the Nahal Infantry Brigade use paintball guns during an urban warfare training in the West Bank Jewish settlement of Alei Zahav, near Ariel July 13, 2016. REUTERS/Baz Ratner

Paint is seen on the goggles of an Israeli soldier from the Nahal Infantry Brigade after he was hit by a paintball during an urban warfare training in the West Bank Jewish settlement of Alei Zahav, near Ariel July 13, 2016. REUTERS/Baz Ratner

Israeli soldiers from the Nahal Infantry Brigade use paintball guns during an urban warfare training in the West Bank Jewish settlement of Alei Zahav, near Ariel July 13, 2016. REUTERS/Baz Ratner

Israeli soldiers from the Nahal Infantry Brigade use paintball guns during an urban warfare training in the West Bank Jewish settlement of Alei Zahav, near Ariel July 13, 2016. REUTERS/Baz Ratner

Israeli soldiers from the Nahal Infantry Brigade use paintball guns during an urban warfare training in the West Bank Jewish settlement of Alei Zahav, near Ariel July 13, 2016. REUTERS/Baz Ratner

Paint from a pellet is seen in mid-air as Israeli soldiers from the Nahal Infantry Brigade use paintball guns during an urban warfare training in the West Bank Jewish settlement of Alei Zahav, near Ariel July 13, 2016. REUTERS/Baz Ratner TPX IMAGES OF THE DAY

Baby arugula grows in a vertical farming bed beneath light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures for growing a variety of baby greens at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24,2016. REUTERS/Mike Segar

Watercress seedlings grow on AeroCloth, a growing material, in a vertical farming bed beneath light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures for growing a variety of baby greens at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24, 2016. REUTERS/Mike Segar

Watercress seedlings grow on AeroCloth growing material in a vertical farming bed beneath light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures for growing a variety of baby greens at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24, 2016. REUTERS/Mike Segar

Workers walk near vertical farming beds growing a variety of baby greens beneath light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24. REUTERS/Mike Segar

Co-founder and CEO of AeroFarms Inc. David Rosenberg speaks to Reuters at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24. REUTERS/Mike Segar

A worker inspects vertical farming beds for growing a variety of baby greens beneath light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24, 2016. REUTERS/Mike Segar

Worker David Catarino spreads green romaine lettuce seeds on AreoCloth planting cloth to be grown into baby lettuce in vertical farming beds lit with light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures for growing a variety of baby greens at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24. REUTERS/Mike Segar

A worker carries a box of freshly harvested greens past vertical farming beds growing a variety of baby greens beneath light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures for growing baby greens at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24. REUTERS/Mike Segar

Employees toss freshly harvested watercress that was grown in vertical farming beds beneath light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures for growing a variety of baby greens at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24. REUTERS/Mike Segar

Co-founder and CEO of AeroFarms Inc. David Rosenberg speaks to Reuters as he stands next to vertical farming beds at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24, 2016. REUTERS/Mike Segar

Workers chat as they work at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24, 2016. REUTERS/Mike Segar

Watercress seedling grow on AeroCloth growing material in a vertical farming bed beneath light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures for growing a variety of baby greens at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24. REUTERS/Mike Segar

An employee tosses baby kale that was grown in vertical farming beds beneath light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures for growing a variety of baby greens at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24, 2016. REUTERS/Mike Segar

Baby red romaine lettuce (bottom) and arugula (top) grow in vertical farming beds beneath light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures for growing a variety of baby greens at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24, 2016. REUTERS/Mike Segar

A worker carries freshly harvested baby kale grown in vertical farming beds beneath light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures for growing a variety of baby greens at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24, 2016. REUTERS/Mike Segar

A worker rides a lift while carrying freshly harvested baby kale grown in vertical farming beds beneath light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures for growing a variety of baby greens at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24. REUTERS/Mike Segar

A worker inspects vertical farming beds growing a variety of baby greens beneath light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24, 2016. REUTERS/Mike Segar

Worker Kwame Holmes inspects baby red romaine lettuce growing in a vertical farming bed beneath light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures for growing a variety of baby greens at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24, 2016. REUTERS/Mike Segar TPX IMAGES OF THE DAY

Worker Kwame Holmes inspects baby red romaine lettuce growing in a vertical farming bed beneath light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures for growing a variety of baby greens at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24. REUTERS/Mike Segar

Worker David Catarino waters AeroCloth planting cloth before seeding it with baby lettuce seeds to be grown in vertical farming beds lit with light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures to grow a variety of baby greens at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24, 2016. REUTERS/Mike Segar

A worker rides a lift past racks of vertical farming beds lit with light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures to grow a variety of baby greens at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24, 2016. REUTERS/Mike Segar TPX IMAGES OF THE DAY

Worker David Catarino spreads green romaine lettuce seeds on AeroCloth planting material to be grown into baby lettuce in vertical farming beds lit with light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures, at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24, 2016. REUTERS/Mike Segar

Baby red romaine lettuce grows in a vertical farming bed beneath light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures, at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24, 2016. REUTERS/Mike Segar

Baby red romaine lettuce grows in a vertical farming bed beneath light emitting diode (or "LED") lamps and using a patented growing algorithm of controlled light, nutrients and temperatures, at an AeroFarms Inc. indoor vertical farming facility in a former indoor paintball arena in Newark, New Jersey, June 24, 2016. Picture taken June 24, 2016. REUTERS/Mike Segar

A youth hurls paintballs towards riot policemen during during May Day protests in Bogota, Colombia, May 1, 2016. REUTERS/John Vizcaino

Israeli couples attend a "trash the dress" event at a paint-ball venue in the southern Israeli city of Ashdod, December 25, 2015. Twelve Israeli couples wore their wedding outfits once again on Friday as they took part in a video clip where they deliberately ruined their wedding outfits, in keeping with the trendy wedding style photography dubbed "trash the dress". REUTERS/Amir Cohen

An Israeli couple attend a "trash the dress" event at a paint-ball venue in the southern Israeli city of Ashdod, December 25, 2015. Twelve Israeli couples wore their wedding outfits once again on Friday as they took part in a video clip where they deliberately ruined their wedding outfits, in keeping with the trendy wedding style photography dubbed "trash the dress". REUTERS/Amir Cohen

An Israeli bride attends a "trash the dress" event at a paint-ball venue in the southern Israeli city of Ashdod, December 25, 2015. Twelve Israeli couples wore their wedding outfits once again on Friday as they took part in a video clip where they deliberately ruined their wedding outfits, in keeping with the trendy wedding style photography dubbed "trash the dress". REUTERS/Amir Cohen

An Israeli couple attend a "trash the dress" event at a paint-ball venue in the southern Israeli city of Ashdod, December 25, 2015. Twelve Israeli couples wore their wedding outfits once again on Friday as they took part in a video clip where they deliberately ruined their wedding outfits, in keeping with the trendy wedding style photography dubbed "trash the dress". REUTERS/Amir Cohen

An Israeli couple attend a "trash the dress" event at a paint-ball venue in the southern Israeli city of Ashdod, December 25, 2015. Twelve Israeli couples wore their wedding outfits once again on Friday as they took part in a video clip where they deliberately ruined their wedding outfits, in keeping with the trendy wedding style photography dubbed "trash the dress". REUTERS/Amir Cohen

An Israeli couple attend a "trash the dress" event at a paint-ball venue in the southern Israeli city of Ashdod, December 25, 2015. Twelve Israeli couples wore their wedding outfits once again on Friday as they took part in a video clip where they deliberately ruined their wedding outfits, in keeping with the trendy wedding style photography dubbed "trash the dress". REUTERS/Amir Cohen

An Israeli couple attend a "trash the dress" event at a paint-ball venue in the southern Israeli city of Ashdod, December 25, 2015. Twelve Israeli couples wore their wedding outfits once again on Friday as they took part in a video clip where they deliberately ruined their wedding outfits, in keeping with the trendy wedding style photography dubbed "trash the dress". REUTERS/Amir Cohen

Israeli couples attend a "trash the dress" event at a paint-ball venue in the southern Israeli city of Ashdod, December 25, 2015. Twelve Israeli couples wore their wedding outfits once again on Friday as they took part in a video clip where they deliberately ruined their wedding outfits, in keeping with the trendy wedding style photography dubbed "trash the dress". REUTERS/Amir Cohen

Israeli couples attend a "trash the dress" event at a paint-ball venue in the southern Israeli city of Ashdod, December 25, 2015. Twelve Israeli couples wore their wedding outfits once again on Friday as they took part in a video clip where they deliberately ruined their wedding outfits, in keeping with the trendy wedding style photography dubbed "trash the dress". REUTERS/Amir Cohen

An Israeli couple wears a paintball mask as they attend a "trash the dress" event at a paint-ball venue in the southern Israeli city of Ashdod, December 25, 2015. Twelve Israeli couples wore their wedding outfits once again on Friday as they took part in a video clip where they deliberately ruined their wedding outfits, in keeping with the trendy wedding style photography dubbed "trash the dress". REUTERS/Amir Cohen

Israeli couples attend a "trash the dress" event at a paint-ball venue in the southern Israeli city of Ashdod, December 25, 2015. Twelve Israeli couples wore their wedding outfits once again on Friday as they took part in a video clip where they deliberately ruined their wedding outfits, in keeping with the trendy wedding style photography dubbed "trash the dress". REUTERS/Amir Cohen

Members of the municipal police aim at each other with paintball rifles during a law enforcement combat training in Ciudad Juarez May 22, 2015. In order to be promoted, some 150 active police officers participated in a three-week long training course which include feedback on human rights related issues, handling different weapons and reactions to ambush situations among other topics, according to a police press release. REUTERS/Jose Luis Gonzalez
TPX IMAGES OF THE DAY

A member of the municipal police laughs after being hit by a paint pellet during a law enforcement combat training with paintball rifles in Ciudad Juarez May 22, 2015. In order to be promoted, some 150 active police officers participated in a three-week long training course which include feedback on human rights related issues, handling different weapons and reactions to ambush situations among other topics, according to a police press release. REUTERS/Jose Luis Gonzalez

Members of the municipal police run with paintball rifles during a law enforcement combat training in Ciudad Juarez May 22, 2015. In order to be promoted, some 150 active police officers participated in a three-week long training course which include feedback on human rights related issues, handling different weapons and reactions to ambush situations among other topics, according to a police press release. REUTERS/Jose Luis Gonzalez

Members of the municipal police take positions with paintball rifles during a law enforcement combat training in Ciudad Juarez May 22, 2015. In order to be promoted, some 150 active police officers participated in a three-week long training course which include feedback on human rights related issues, handling different weapons and reactions to ambush situations among other topics, according to a police press release. REUTERS/Jose Luis Gonzalez

Students from the General Yermolov Cadet School take cover during a paintball competition between school classes in the southern Russian city of Stavropol, November 22, 2014. The General Yermolov Cadet School in Stavropol is a state-run institution that teaches military and patriotic classes in addition to a normal syllabus. Picture taken November 22, 2014. REUTERS/Eduard Korniyenko (RUSSIA - Tags: MILITARY EDUCATION SOCIETY)

Afghan girls gesture after their paintball game at Eagle paintball club in Kabul September 26, 2014. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: SOCIETY)

Afghan girls take positions during a paintball game at Eagle paintball club in Kabul September 26, 2014. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: SOCIETY)

An Afghan girl poses with her goggles after being shot by a paintball gun at Eagle paintball club in Kabul September 26, 2014. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: SOCIETY HEADSHOT)

Members of Eagle paintball club load paintball bullets into a gas-powered gun in Kabul, September 26, 2014. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: SOCIETY)

An Afghan girl poses for photo after a paintball game at Eagle paintball club in Kabul September 26, 2014. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: SOCIETY)