Rolls-Royce Holdings doesn't make cars so luxurious you'll cry (see Motor Cars), but it sure can make an aircraft engine whine. One of the world's largest aircraft engine makers, Rolls-Royce, through its Civil and Defense Aerospace businesses, makes commercial and military engines for a broad customer base, including airlines, corporate and utility aircraft and helicopter operators, and armed forces around the world. Beyond aviation, its Energy unit supplies gas turbine power generation to the oil and gas industry, while its Marine segment makes propulsion systems that power 70 navies worldwide. Rolls-Royce has operations in North America, Europe, and Asia, with an emerging presence in the Middle East.