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Military gambling is a big business. About $2 billion flows through military-owned slot machines at officers' clubs, activities centers and bowling alleys on overseas bases each year. Most flows back out as jackpots, but 6 percent remains with the house, about the same ratio as in Las Vegas.
Each year, the armed forces take in more than $120 million from on-base slot machines and $7 million from Army bingo games at home. These funds help pay for recreational programs for the troops.
But even military researchers have acknowledged that the armed forces are heavily populated by people who, like Aaron Walsh, may be especially vulnerable to gambling addiction: athletic, risk-taking young people who are experiencing severe stress and anxiety.
"And wartime is an environment that is probably creating more vulnerability than usual," said Christine Reilly, executive director of the gambling addiction research institute at Cambridge Health Alliance, a teaching institution for the Harvard Medical School.
http://www.nytimes.com/2005/10/19/business/19slots.html