“Contrails (short for “condensation trails”) or vapour trails are artificial clouds that are the visible trails of condensed water vapour made by the exhaust of aircraft engines. As the hot exhaust gases cool in the surrounding air they may precipitate a cloud of microscopic water droplets or, if the air is cold enough, tiny ice crystals”. – Wikipedia

Photo: An airplane leaves a vapor trail as it flies in front of he moon on January 17, 2007 above Hanover, Germany. (Photo by Alexander Hassenstein/Getty Images)

“The Mikoyan MiG-31 (NATO reporting name: Foxhound) is a supersonic interceptor aircraft developed to replace the MiG-25 “Foxbat”. The MiG-31 was designed by the Mikoyan design bureau based on the MiG-25”. – Wikipedia

Photos: The Mikoyan MiG-31 “Foxhound”. Russia, April 2012. (Photo by Alexandr Pak; Source: LiveJournal)

In this October 21, 2015, file photo, a young man rides a hoverboard along a Manhattan street toward the Empire State Building in New York. More than 500,000 hoverboards are being recalled after reports that they can burst into flames. The Consumer Product Safety Commission said Wednesday, July 6, 2016, it has received 99 reports of battery packs in the two-wheel motorized scooters catching fire or exploding that causing burns or property damage. The recalled hoverboards were made by eight companies. (Photo by Kathy Willens/AP Photo)

An airplane house is pictured in the village of Miziara, northern Lebanon May 12, 2015. Miziara prides itself on building residential homes that resemble ancient Greek temples and Egyptian ruins, one is even built in the shape of an Airbus A380. (Photo by Aziz Taher/Reuters)

A man watches a classic Turkish movie from his car at a temporary drive-in theatre held in a shopping mall car park amid the ongoing Covid-19 pandemic on May 28, 2020 in Istanbul, Turkey. Istanbul and other major cities across Turkey have begun to ease restrictions and have started preparations for the reopening of some locations, shops and services as infection rates continue to drop. As of May 28, Turkey has reported 4,461 coronavirus-related deaths and 160,979 confirmed cases. (Photo by Chris McGrath/Getty Images)

A man plays in front of a wave crashing into Beirut's Corniche, a seaside promenade, as high winds sweep through Lebanon ahead of an impending storm January 6, 2015. (Photo by Jamal Saidi/Reuters)

A CIT guard carries his gun handgun while bringing a bag containing cash inside an armoured vehicle during a money collection in Johannesburg's CBD, on December 8, 2020. As the Christmas festive season approaches, cash-in-transit (CIT) companies are gearing up as they continue to be target of crime, with about 3000 money vans traveling daily nationwide. Despite the COVID-19 lockdown, there have been 260 cash-in-transit heist incidents in South Africa this year, with 19 CIT crew members killed. Cash-in-transit heists in the country are often military-style planned operations with criminals recurring to bomb making and assault rifles attacks. (Photo by Michele Spatari/AFP Photo)

A boy reacts as dogs play along the riverbank of Pasig river, in Manila, Philippines, June 10, 2021. (Photo by Lisa Marie David/Reuters)