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A POTD is an acronym for "Photo of the Day", "Picture of the Day", "Post of the Day" or "Poll of the Day". It is a term most commonly used by online digital photography communities as an honor to outstanding photos that are selected daily from among that community's membership. They can either be tagged as POTD or displayed in a special page on that site...

Mike O'Callaghan – Pat Tillman Memorial Bridge (proposed name), known as the Hoover Dam Bypass during planning and early construction, provides a bridge connecting roads for a new route across the Colorado River for U.S. Route 93. The project links the U.S. states of Nevada and Arizona by spanning the Colorado River 1,600 ft (490 m) downstream from the Hoover Dam. The bridge is expected to be open to traffic in November 2010. Its cost has been estimated to be about $240 million...