Private Neil Armstrong service planned for Friday

June 1, 2012: Neil Armstrong, the first man to walk on the moon, attends a graveside service for Wilbur Wright on the 100th anniversary of the burial of the powered flight pioneer in Dayton, Ohio. Armstrong died on Saturday, Aug. 25. (AP)

July 20, 1969: Apollo 11 astronauts Neil Armstrong and Edwin E. "Buzz" Aldrin, the first men to land on the moon, plant the U.S. flag on the lunar surface. (AP Photo/NASA)

1. Neil Armstrong, Apollo 11, 1969: The crew of the Apollo 11 mission -- from left Neil Armstrong, Mission Commander, Michael Collins, Lt. Col. USAF, and Edwin Eugene Aldrin, also known as Buzz Aldrin, USAF Lunar Module pilot. In all, 12 Americans walked on the moon from 1969 to 1972. (NASA)

A private service is planned in Cincinnati on Friday for astronaut Neil Armstrong, the first man to walk on the moon, and President Barack Obama has ordered U.S. flags to be flown at half-staff.

The Ohio native died Saturday in Cincinnati at age 82. No other information was released immediately about the service.

Obama on Monday issued a proclamation calling for U.S. flags to be lowered the day of Armstrong's burial, including at the White House, military posts and ships, U.S. embassies and other public buildings "as a mark of respect for the memory of Neil Armstrong."

Ohio Gov. John Kasich on Monday had Ohio flags on all public buildings and grounds flown at half-staff through Friday.

There have been preliminary discussions about a national memorial service for Armstrong, who often shunned publicity in the decades after his historic mission, but a family spokesman said there were no details yet.

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U.S. Sen. Rob Portman, who is from Ohio and has called Armstrong "a good friend and adviser," will eulogize him at Friday's service.

Portman is in Tampa, Fla., for the Republican National Convention, where he is scheduled to speak Wednesday night. Spokeswoman Caitlin Dunn said his office is working on travel arrangements to get him back to Cincinnati in time for the service. The convention schedule has already been changed this week and could be further disrupted as Tropical Storm Isaac bears down on the Gulf Coast.

Portman called Armstrong humble and gracious and on Monday he recounted for Ohioans at the convention an anecdote demonstrating Armstrong's compassion for veterans and his desire to keep a low profile: Several years ago, the former astronaut accepted Portman's request to help dedicate a veterans memorial in Mason, Ohio, but asked that his participation not be announced in advance. The crowd quickly rose in standing ovation when Armstrong was introduced, Portman recalled.

The Museum of Natural History & Science of the Cincinnati Museum Center has an exhibit that includes a moon rock and replicas of Armstrong's Apollo 11 spacesuit and tools used on the moon. It is offering free admission through Labor Day to honor Armstrong, and more than 2,000 people visited Sunday.

Armstrong, who commanded the Apollo 11 moon landing on July 20, 1969, was born in Wapakoneta, in western Ohio. He is celebrated there at the Armstrong Air & Space Museum, which is planning a memorial tribute Wednesday night.

The tribute is called "Wink at the Moon." The statement Armstrong's family released upon his death requested that the public honor his example of service, accomplishment and modesty, adding "and the next time you walk outside on a clear night and see the moon smiling down at you, think of Neil Armstrong and give him a wink."