File:Samuel Pierpont Langley - Potomac experiment 1903.jpeg

Photograph of first attempt to fly the manned Langley Aerodrome, October 7, 1903. The experiment failed, and the machine and its pilot, Charles Manly, fell into the Potomac River. Manly was unhurt.

Sources for this information:

http://www.centennialofflight.net/essay/Prehistory/Last_Decade/PH5.htm

http://www.chopawamsic.com/First%20Flight.htm

The original uploader of this image wrote the following:

Samuel Pierpont Langley - Potomac experiment 1903. I do not know the origin of this photograph, nor whether it captures his first flight (Oct 1903) or second flight (Dec 1903). Nonetheless it clearly shows his launchpad aerodrome on the Potomac River. This image is in the public domain because first published before 1923.

From:http://en.wikipedia.org/wiki/Image:Samuel_Pierpont_Langley_-_Potomac_experiment_1903.jpeg

	這一媒體文件在美國屬於公有領域。這可用於版權過期的美國作品，通常這些作品發表於1929年1月1日之前。查看這個頁面可以獲取到更多的解釋。
	這一圖片在美國以外可以沒有處於公有領域，特別是對美國作品不適用較短期限法則的國家，如加拿大、中國大陸（不含香港及澳門）、德國、墨西哥和瑞士。作品的作者和發表時間是關鍵信息，並且必須提供。參見 維基百科:公有領域及維基百科:版權信息以獲取更多細節。