Warships from 17 nations, including the United States and China, have arrived in Sydney Harbor to celebrate the 100th anniversary of the establishment of Australia's navy.
Australian Navy Celebrates 100th Anniversary

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A Royal Australian Navy helicopter towing the Australian naval ensign passes over the Opera House during the International Fleet review, Sydney, Oct. 4, 2013.

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Royal Australian Navy warships led by HMAS Sydney enter Sydney Harbor as part of the International Fleet Review celebrations, Oct. 4, 2013.

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Royal Australian Navy warships led by HMAS Sydney enter Sydney Harbor as part of the International Fleet Review celebrations, Oct. 4, 2013.

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Republic of Singapore Navy's RSS Endeavour enters Sydney Harbor as part of the International Fleet Review celebrations, Oct. 4, 2013.