Here is an interesting development on the southern border that may require a larger security requirement.

U.S. GULF OF MEXICO -- Eight miles north of the maritime border with Mexico, in waters a mile and a half deep, Shell Oil Co. is constructing the most ambitious offshore oil platform ever attempted in the Gulf of Mexico.

As tall as the Eiffel Tower, the floating production facility will be anchored to the ocean floor by moorings spanning an area the size of downtown Houston. Slated to begin operating late next year, this leviathan known as Perdido (or Lost) will cost billions and be capable of pumping 100,000 barrels of crude a day. ....