日本では何年働けば退職金がもらえる？
In the United States, while the normal retirement age for Social Security, or Old Age Survivors Insurance (OASI), historically has been age 65 to receive unreduced benefits, it is gradually increasing to age 67. For those turning 65 in 2008, full benefits will be payable beginning at age 66. Public servants are often not covered by Social Security but have their own pension programs. Police officers in the United States are typically allowed to retire at half pay after only 20 years of service or three-quarter pay after 30 years, allowing people to retire in their early forties or fifties. Military members of the US Armed Forces may elect to retire after 20 years of active duty. Their retirement pay (not a pension since they can be involuntarily called back to active duty at any time) is calculated on total number of years on active duty, their final pay grade and the retirement system in place when they entered service. Allowances such as housing and subsistence are not used to calculate a member's retired pay. Members awarded the Medal of Honor qualify for a separate stipend, regardless of the years of service. Military members in the reserve and US National Guard have their retirement based on a point system. 
65