TOW (& Answer)...

The question was what is the significance of Wilson v. Shaw?  Wilson v. Shaw was a 1907 case in which the plaintiff argued that the U.S. government did not have the right to buy the Panamanian land to build the canal.  The case came back against the plaintiff and the Supreme Court found that not only did the government have that power but they had the power to construct interstate highways. This cleared a legal hurdle and allowed for the government to being paving U.S. roads.

The question (& answer) were found on p. 183 of The Historical Atlas of American Crime by Fred Rosen.  The book was published by Facts on File, Inc. in 2005.