SDTV and high definition television (HDTV) are the two categories of display formats for digital television (DTV) transmissions, which are becoming the standard. In North America, digital SDTV is broadcast in the same 4:3 aspect ratio as NTSC signals with widescreen content being center cut.
Command pilot Neil Armstrong 's flight marked the second time a U.S. civilian flew into space (Joseph Albert Walker became the first U.S. civilian on X-15 Flight 90). Armstrong had resigned his commission in the United States Naval Reserve in 1960.
CINCINNATI (AP) -- Neil Armstrong was a quiet self-described nerdy engineer who became a global hero when as a steely-nerved pilot he made one giant leap for mankind with a small step on to the moon. The modest man who had people on Earth entranced and awed from almost a quarter million miles away has died.