School teachers and staff members take part during an active shooter training at James I. O'Neill High School in Highland Falls, New York, U.S., December 12, 2017. (Photo by Eduardo Munoz/Reuters)

Army paratroopers carry the casket of Private Howard at the Wellington Cathedral on December 21, 2010 in Wellington, New Zealand. Private Howard was serving with the British army when was killed by friendly fire from a US Air Force plane in Helmand Province, Afghanistan earlier this month. Private Howard is the fifth NZ-born soldier to be killed in action in Afghanistan. (Photo by Marty Melville/Getty Images)

Starlings are seen at their nesting box in a private garden in the town of Bobruisk, Belarus, April 8, 2018. (Photo by Vasily Fedosenko/Reuters)

“Sangoma” initiate Dipuo Banda (C) is led out of her teachers shack while she remains in a trance like state prior to dancing during her 3 day initiation ceremony with her teacher, family, friends and students in the Alexandra Township in Johannesburg, South Africa, 14 May 2021. Sangomas, the Zulu term for Medicine Women or traditional healers, fulfill different social and political roles in the community, including divination, physical healing, emotional and spiritual illnesses, directing birth or death rituals and finding lost cattle. (Photo by Kim Ludbrook/EPA/EFE)

American singer-songwriter, producer and former dancer Anastacia and teacher dancer Maykel Fonts perform during the “Dancing with the Stars” TV show in Rome, Italy on March 24, 2018. (Photo by PA Press Association)

Teacher Mahajera Armani and her class of girls pose for a picture at their study open area, founded by Bangladesh Rural Advancement Committee (BRAC), outside Jalalabad city, Afghanistan September 19, 2015. (Photo by Reuters/Parwiz)

The luxury Jetstar private jet, built in the seventies and retaining most of the original features which is now being used as a holiday let is seen in Redberth, Pembrokeshire, Wales, January 11, 2017. (Photo by Rebecca Naden/Reuters)

An activist kicks the shields of the military police officers during a demonstration in the military zone of the 27th infantry battalion in Iguala, Guerrero, January 12, 2015. Activists and relatives of the 43 missing trainee teachers from Ayotzinapa's teacher training college broke into the military zone, located less than a mile from where the students went missing, in an attempt to look for the missing students.The remains of only one of the 43 students has been identified so far. (Photo by Jorge Dan Lopez/Reuters)