A snowmobile pulls Russian President Vladimir Putin as he visits a mountainside resort in Sochi in Feb. 2007. Itar-Tass/POOL/Presidential Press Service/AFP/Newscom/File
A man jumps a snowmobile in Alberta, Canada. DEP/Newscom/File
Snowmobiling participants compete in the Winter X Games on Oct. 30, 2009. RCA/Newscom/File
American Justin Hoyer competes on a snowmobile during the Freestyle Motocross contest on Vasilyevsky Slope in front of St. Basil Cathedral, next to Moscow's Red Square on Nov. 20, 2009. Hoyer won the first place. Itar-Tass/Vitaly Belousov/Newscom/File
Engineers at car giant Lotus have developed this hi-tech snowmobile to help adventurers explore the Antarctic wilderness. The biofuel-powered Concept Ice Vehicle has special radar for navigating snowy wastelands, and a spiked front foot for advanced braking. WENN/Newscom/File
A pair of drivers turn a corner during a race around an oval in a heat during the 33rd Annual World Championship Snowmobile Watercross on July 17, 2009 on Memory Lake in Grantsburg, Wis. The Grantsburg Lions Club held its first Watercross competition in July 1977 when running snowmobiles over water was a new and challenging past-time. The first race was simply held to see who could make it from the island on Memory Lake in Grantsburg to the shore, some 300 ft. away. Most didn't, but the winner did go about 500 ft. Today they race both drags and ovals with a six-lap championship run. Mark Hoffman/Milwaukee Journal Sentinel/Rapport Syndication/Newscom/File
Russian President Dmitry Medvedev (r.) rides a snowmobile at the Russian ski resort Krasnaya Polyana near Sochi, Russia, on Jan. 4. Dmitry Astakhov/Itar-Tass/ABACAPRESS.COM/Newscom/File
A refurbished B12 snowmobile is parked on the slopes of Prarion in the Chamonix valley, France. Invented by Canadian Joseph-Armand Bombardier in 1941, the B12 snowmobile has blades for front wheels and a modified rubber traction system in the rear. This kind of snowmobile was first used in the Second World War to help move troops. Sipa/Newscom/File
Ded Morozes (Russian Santa Clauses) ride a snowmobile during a parade in Rybinsk, Russia on Dec. 24. Itar-Tass/Sergei Metelitsa/Newscom
A combat car replica is seen during a test run in Ludvikov, Czech Republic, 174 miles east of Prague. The snowmobile was designed in the Tatra Koprivnice car factory for Nazi Wehrmacht troops during the World War II but its development was never finished. Vladislav Galgonek/CTK/ABACAPRESS.COM/Newscom/File
Steve Musser rides a snowmobile down the slopes at Willamette Pass, Oregon, on Jan. 28, after checking the snow conditions and depth on the mountain. The area has seen enough snow to ski but less than the average snowfall so far this year. Zuma/Newscom/File
A man drives a snowmobile in South Tyrol, Italy on July 24, 2009. Newscom/File
People riding a snowmobile around Grimsel Pass on Nov. 20, 2009 enjoy fantastic views over the Goms Valley in Southwest Switzerland. Newscom/File
At least 60,000 mostly Kurdish refugees have entered Turkey since Thursday after Islamic State militants surrounded a Kurdish stronghold in northern Syria. Some are calling for US airstrikes to stop the group's advance.
ByDominique Soguel, Correspondent
Tens of thousands of Syrians have crossed into Turkey in recent days, fleeing an Islamic State offensive that has opened up another front in Syria's civil war as the US weighs a bombing campaign there.