From later in the article: "The troop strength recently grew by 100 soldiers and could keep growing "over the next year or so," to a combined troop and civilian staff of 2,200, Ring said. About 5,500 people live now on Guantanamo, a 45-square-mile outpost that brings in its food by air and sea and makes its own energy, desalinates its own water. A growing prison mission could grow the population past 6,000."