motorbike

Yamaha rider Valentino Rossi of Italy pulls a wheelie during the first training session of the MotoGP Grand Prix of Germany at the Sachsenring Circuit on July 10, 2015 in Hohenstein-Ernstthal, eastern Germany.

Robert Michael/AFP

Yamaha rider Valentino Rossi of Italy pulls a wheelie during the first training session of the MotoGP Grand Prix of Germany at the Sachsenring Circuit on Friday in Hohenstein-Ernstthal, eastern Germany.

Australia's Steve Sommerfeld performs a jump on his motocross bike backdropped by the O2 Arena during a promotional event in London, Tuesday, June 2, 2015.  The publicity stunt Tuesday was to promote the freestyle motocross world tour event "Night of the Jumps" which takes place inside the O2 Arena on September 5

Matt Dunham/AP

Australia’s Steve Sommerfeld performs a jump on his motocross bike with the O2 Arena int eh background, during a promotional event in London on Tuesday

Pedestrians pay for piggy-back rides across flooded Morogoro Road in Dar es Salaam, Tanzania, on Thursday

Daniel Hayduk/AFP

Pedestrians pay for piggy-back rides across flooded Morogoro Road in Dar es Salaam, Tanzania, on Thursday

Honda MotoGP rider Marc Marquez of Spain poses on the Millennium Bridge with St Paul's Cathedral seen behind, in London, August 27, 2014. The British Grand Prix takes place at Silverstone on August 31.

Toby Melville/Reuters

Honda MotoGP rider Marc Marquez of Spain poses on the Millennium Bridge with St Paul’s Cathedral seen behind, in London on Wednesday, ahead of the British Moto Grand Prix at Silverstone

Yamaha MotoGP rider Valentino Rossi of Italy takes a curve during the first free practice session of the Spanish Grand Prix in Jerez de la Frontera, southern Spain, May 2, 2014.

Marcelo del Pozo/Reuters

Yamaha MotoGP rider Valentino Rossi of Italy takes a curve during the first free practice session of the Spanish Grand Prix in Jerez de la Frontera, southern Spain

Indian commuters make their way through a downpour in Amritsar on August 12, 2013. T he monsoon, which covers the subcontinent from June to September and usually brings flooding, accounts for about 80 percent of India's annual rainfall.

Narinder Nanu/AFP

Indian commuters make their way through a downpour in Amritsar on Monday. The monsoon, which covers the subcontinent from June to September and usually brings flooding, accounts for about 80 per cent of India’s annual rainfall

A Cambodian farmer drives his motorbike on a wooden bridge leading to a Christian church while it is fixed by ethnics Vietnamese at Koh Phos village in Kandal Province, some 25 kilometers (15 miles) east of Phnom Penh, Cambodia, Tuesday, April 30, 2013.

Heng Sinith/AP

A Cambodian farmer rides his motorbike on a wooden bridge leading to a Christian church, which is being repaired by ethnic Vietnamese at Koh Phos village in Kandal Province, about 25 km east of Phnom Penh, Cambodia.