So on April Fools' Day in 2011, trainers at harness tracks tried it on nine racehorses.
NATO agreed that non-American members would provide half of the 5,200 trainers.
When it began, it had two nations and 30 trainers; it now has 32 nations and more than 1,300 trainers.
The Adidas' 7X750 trainers, made in collaboration with artist Ryan Gander, implies you believe in 'handcrafted' mud.
My dad's shoes: funny blue 1980s trainers with an N on the side.
Of the 5,200 trainers the United States and its NATO allies in January agreed were needed, about only 2,700 are there.
A senior American official, who briefed reporters on condition of anonymity, said that 1,500 trainers were already in place.
Since December, those capitals have pledged to send only 1,000 trainers, and they have been very slow to deliver.
The alliance has fallen 450 people short of a goal to supply 2,000 trainers for the Afghan national police force by October.
Earlier this year, he decided to send an additional 17,000 combat soldiers and 4,000 trainers to Afghanistan, raising American force levels there to more than 60,000.
