A succession of U.S. officials and envoys were unable to compel their allies to end it.
Mr. Stevenson received the patent for the kicktail in 1971 but was unable to compel most companies to pay royalties.
Christopher Shays, a former congressman and co-chairman of the commission, said there was "a serious failure on the part of the State Department in being unable to compel the contractor to fulfill its commitment".
But the commission also said that because it was unable to compel testimony through the powers of subpoena and grants of immunity, it could get at only part of the truth.
One of the major challenges faced by Garcia during his 18-month investigation was that he was unable to compel those no longer involved in football, such as the banned former Asian Football Confederation president Mohamed bin Hammam, to give evidence.
"The current Northern Ireland inquiry is unable to compel the release of files from either Whitehall or the secret services, and given the nature of the allegations over Kincora, this is exactly where any secrets are likely to lie buried," he said.
Because the Indians were well-armed, the Franciscans were unable to compel them to join the missions.
In the face of these relative inconveniences and the economy of shipping over the trails, the Hudson's Bay Company was unable to compel all trade to go by way of York Factory on Hudson Bay, and by 1850 the company's monopoly was broken.
Papers would be unable to compete.
So WhatsApp will be unable to be compelled to hand over messaging data — even if served with a warrant by authorities demanding access.
