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In Tennessee, Interstate 40 (I-40) runs from west to east, from the Mississippi River at the Arkansas border to the Blue Ridge Mountains at the North Carolina state line. Paralleling the older U.S. Route 70 corridor, I-40 passes through Tennessee's three largest cities—Memphis, Nashville, and Knoxville—and serves the Great Smoky Mountains National Park, the most-visited national park in the United States. At 455.28 miles (732.70 km), the Tennessee segment of I-40 is the longest of those in the eight states through which the highway passes and the state's longest Interstate Highway. Built in segments, I-40 in Tennessee was mostly complete by the late 1960s. The construction of the highway resulted in the U.S. Supreme Court decision Citizens to Preserve Overton Park v. Volpe (1971), increasing the scope for judicial review of administrative actions. The case caused the state to realign I-40's route through Memphis onto what was originally a section of I-240. (Full article...)

Vang Vieng is a town in Vientiane province of Laos, lying on the Nam Song River. It is surrounded by karst topography. The town was first settled around 1353 as a staging post between Luang Prabang and the Laotian capital, Vientiane. Originally named Mouang Song after the body of the deceased King Phra Nha Phao of Phai Naam was seen floating down the river, the town was renamed Vang Vieng during French colonial rule in the 1890s. During the Vietnam War, the United States military constructed an air-force base and runway in Vang Vieng, known as "Lima site 6". Since Laos opened up for tourism in the late 1990s, the town has grown substantially due to the influx of backpacker tourism and associated business development. This view of the town and surrounding karst was taken from the top of Mount Nam Xay in June, during the monsoon season.

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I-40 in the Pigeon River gorge

Henry, the London Bridge station pipe organ

Ryan Blaney

SARS Virus