| 1860 | | 3 Apr:
The Pony Express mail delivery service is established.PX NPX |
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| 1864 | |
| 1873 | | 20 May:
Levi Strauss and Jacob Davis receive a patent for blue jeans with copper rivets.W I R E D LS&Co |
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| 1913 | | 31 Oct:
The first transcontinental highway, the Lincoln Highway, is dedicated.DOT ILH |
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| 1930 | | 7 Jul:
Construction of the Hoover Dam begins.Tucson CC |
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| 1931 | |
| 1936 | |
| 1992 | | 23 Nov:
The world's first smartphone, the IBM Simon, is introduced at COMDEX in Las Vegas.Techverse ScienceInfo |
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| 2017 | | 1 Oct:
A gunman opens fire on a crowd of concertgoers in Las Vegas, Nevada, killing 58 people and injuring 546.CBSNews JEMS |
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Nevada
