In this handout photo released by Kooperativ Telegram Channel, flames and smoke rise from the scene after a warplane crashed into a residential area in Yeysk, Russia, Monday, October 17, 2022. The Russian military says one of its warplanes has crashed near an apartment building in Yeysk, a port city on the Sea of Azov, after experiencing engine failure on takeoff. The crash ignited a huge fire, killing at least four people, leaving six missing and injuring 21 others, eight of whom were in grave condition. One of the pilots, right, descends on a parachute. (Photo by Kooperativ Telegram Channel via AP Photo)

This handout photo taken and released on August 1, 2025 by Indonesia's Geological Agency shows Mount Lewotobi Laki-Laki spewing lava and volcanic ash up to approximately 10 kilometres high during its eruption as observed from the monitoring post in East Flores, in East Nusa Tenggara province. A volcano in eastern Indonesia erupted on August 1, belching an ash tower 10 kilometres (6.2 miles) into the sky, the country's volcanology agency said, weeks after another huge eruption triggered dozens of flight cancellations to and from Bali. (Photo by Indonesia's Geological Agency/AFP Photo)

With the entry of Poland into the European Union in 2004, Warsaw is currently experiencing the biggest economic boom of its history. The opening match of UEFA Euro 2012 is scheduled to take place in Warsaw. (Photo by: ryarwood; Source: Flickr)

“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)

Poznań is now Poland's fifth largest city. It is sometimes claimed to be the first capital of the kingdom of Poland. Poznań has many historic buildings and sights. The European Football Championship will take place in Poznan 2012.

Photo by: tiseb ; Source: Flickr

A Siberian tiger cub is seen at the Hengdaohezi Breeding Center for Felidae on October 26, 2007 in Harbin of Heilongjiang Province, China. Established in 1986, the breeding center is one of the world's largest captive breeding base for Siberian tigers. Distributed throughout northeastern China, far eastern Russia and North Korea, over 400 Siberian tigers exist in the wild, approximately 20 in China. (Photo by China Photos/Getty Images)

In this photo provided by the U.S. Coast Guard, the Russian tanker Renda powers toward Nome, Alaska with the U.S. Coast Guard Cutter Healy's assistance January 6, 2012 in the Bering Sea. (Photo by Sara Francis/U.S. Coast Guard via Getty Images)

Workers demonstrate outside the factory of Hua Yang Printing Holdings Co Ltd on October 30, 2007 in Shenzhen of Guangdong Province, China. Over 1,000 workers of the company have blocked the 107 State Highway where the firm is located, to protest against their employer, who owed half a month's salary to the workers. (Photo by China Photos/Getty Images)