American Know-How
Ah, that pesky metric system! It seems it only exists to confuse Americans with the true measurements of things in their life. As The USA is one of the very, very few countries around the world that continue to measure with the Imperial system, They are not so familiar with the Metric system.
The confusing thing about this hold on the Imperial system is that just about every other country in the world uses the Metric system, so one step out of the USA and most Americans are utterly confused. Just for future reference, a kilometer is a bit over 1000 yards – just over half a mile. A mile is 1760 yards. Now you know!