"WASHINGTON (CNN) -- A federal anti-terror law that requires longshoremen, truckers and others to submit to criminal background checks has ensnared another class of transportation worker -- mule drivers.
Mule skinners must abide by federal law and apply for Transportation Worker Identification Credentials, TSA says.
Yes, so-called mule skinners -- in this case, seasonal workers who dress in colonial garb at a historical park in Easton, Pa. -- must apply for biometric Transportation Worker Identification Credentials (TWIC), according to the Transportation Security Administration, which says it is bound by federal law.
The requirement has officials of the Hugh Moore Historical Park perplexed.
"We have one boat. It's pulled by two mules. On a good day they might go 2 miles per hour," said Sarah B. Hays, the park's director of operations.
The park's two-mile canal does not pass any military bases, nuclear power plants or other sensitive facilities. And, park officials say, the mules could be considered weapons of mass destruction only if they were aimed at something resembling food."
