They're a bear to rig up on land rigs, and there is a shortage of personnel to run them.
They have a much wider useage offshore which makes it feasible for Rowan to own them.
No kidding, this is worry over NOTHING. I might also point out that I don't think ANY US owned company makes these things any more. Canrig and TESCO are Canadian, and I think the Bowen bunch is headed by an Arab, though I know "The Ambassador" got out a few years back, and that may have changed.
That's all it takes! One man who knows exactly what the article is about.
Much thanks Tex for explaing it to us ignorant ones.