![File:Protester wearing a tear gas mask against background of the massive fire set by protesters to prevent internal forces from crossing the barricade line. Kyiv, Ukraine. Jan 22, 2014.jpg - Wikimedia Commons File:Protester wearing a tear gas mask against background of the massive fire set by protesters to prevent internal forces from crossing the barricade line. Kyiv, Ukraine. Jan 22, 2014.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/3/39/Protester_wearing_a_tear_gas_mask_against_background_of_the_massive_fire_set_by_protesters_to_prevent_internal_forces_from_crossing_the_barricade_line._Kyiv%2C_Ukraine._Jan_22%2C_2014.jpg)
File:Protester wearing a tear gas mask against background of the massive fire set by protesters to prevent internal forces from crossing the barricade line. Kyiv, Ukraine. Jan 22, 2014.jpg - Wikimedia Commons
![Kiev, Ukraine - October 12, 2017: Army Gas Mask At The Exhibition "Arms And Security - 2017" Stock Photo, Picture And Royalty Free Image. Image 87505904. Kiev, Ukraine - October 12, 2017: Army Gas Mask At The Exhibition "Arms And Security - 2017" Stock Photo, Picture And Royalty Free Image. Image 87505904.](https://previews.123rf.com/images/lanarusfoto/lanarusfoto1710/lanarusfoto171000187/87505904-kiev-ukraine-october-12-2017-army-gas-mask-at-the-exhibition-arms-and-security-2017.jpg)
Kiev, Ukraine - October 12, 2017: Army Gas Mask At The Exhibition "Arms And Security - 2017" Stock Photo, Picture And Royalty Free Image. Image 87505904.
![old doll in a gas mask in an abandoned house Chernobyl Ukraine - a Royalty Free Stock Photo from Photocase old doll in a gas mask in an abandoned house Chernobyl Ukraine - a Royalty Free Stock Photo from Photocase](https://www.photocase.com/photos/3371192-old-doll-in-a-gas-mask-in-an-abandoned-house-chernobyl-ukraine-photocase-stock-photo-large.jpeg)
old doll in a gas mask in an abandoned house Chernobyl Ukraine - a Royalty Free Stock Photo from Photocase
![A man wearing gas masks as a preventive measure against the covid-19 coronavirus during the march.Thousands of Ukrainian servicemen and volunteers took part in the March of patriots marking the Volunteer Day A man wearing gas masks as a preventive measure against the covid-19 coronavirus during the march.Thousands of Ukrainian servicemen and volunteers took part in the March of patriots marking the Volunteer Day](https://c8.alamy.com/comp/2B79MAG/a-man-wearing-gas-masks-as-a-preventive-measure-against-the-covid-19-coronavirus-during-the-marchthousands-of-ukrainian-servicemen-and-volunteers-took-part-in-the-march-of-patriots-marking-the-volunteer-day-honouring-soldiers-who-joined-the-ukrainian-army-during-a-military-conflict-in-eastern-ukraine-2B79MAG.jpg)