James Chen is retired from the Department of the Navy and Federal Aviation Administration where he worked as a Radar and Surveillance Systems Engineer. A guest lecturer at local Washington DC/Northern Virginia/Maryland astronomy clubs on amateur astronomy topics of eyepiece design and optical filters, he wrote a short Astronomy Magazine article on Dobsonian telescope design November 1989 and served as ... Read morea sales consultant to two Washington DC area telescope stores for over 30 years. Adam Chen is Program Manager of media support for NASA Headquarters in Washington DC. He was creator and executive producer of major NASA publications including the book and web-book application documenting the history of the Space Shuttle Program “Celebrating 30 Years of the Space Shuttle Program”. Adam Chen is former Program Manager of media support for NASA Headquarters in Washington DC. He is creator and executive producer of major NASA publications, including the book and web-book application documenting the history of the Space Shuttle Program “Celebrating 30 Years of the Space Shuttle Program”. Currently Adam works as Program Manager at Plan it Advertising in Baltimore, MD. Show Less