Washington: The `first man to walk on moon`, Neil Armstrong was honoured by his fellow workers and crewmates during a memorial service at the Johnson Space centre.
The memorial service recalling Armstrong, who has come to `represent human face and human spirit of the Apollo program`, was attended by scores of current and former astronauts, flight directors, flight controllers and engineers, CBS News reports.
Apollo 11 crewmate to Armstrong, Buzz Aldrin who became the second man to walk on moon expressed his gratefulness to Armstrong for having guided him and called him an epitome of a space man, the best test pilot America has ever seen.
Another crewmate Michael Collins remembered Armstrong as a `consummate decision maker who took all accolades but never showed any sign of arrogance`.
Gerry Griffin, an Apollo flight director said that Armstrong had a unique, hard-to-define ability to capture the essence of an issue, prompting everyone in the room to pay attention.
Collins said that Armstrong usually showed up to the occasions when other Apollo flights were honoured and made very clear that the success of Apollo 11 was due to its predecessors and those that followed.
Armstrong died last year in August at the age of 82 due to complications following surgery.
His family including his wife during the NASA years and his sons attended the ceremony where a tree was planted in his honour.