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==Technology== * July 7 β [[Electric aircraft]] [[Solar Challenger]], designed by an [[United States|American]] team led by [[Paul MacCready]] and piloted by Stephen Ptacek, makes a 163-mile (262 km) crossing of the [[English Channel]] using only [[solar power]] from wing-mounted [[photovoltaic cell]]s. * July 17 β [[Hyatt Regency walkway collapse]]: [[Structural failure]] due to a late design change causes two internal suspended walkways at the Hyatt Regency Hotel in [[Kansas City, Missouri]] to collapse, killing 114.
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