An airliner is distorted by the heat waves rising up from the 

An airliner is distorted by the heat waves rising up from the north runway at Sky Harbor International Airport in Phoenix on Friday, June 28, 2013, the hottest day of the year so far. (AP Photo/The Arizona Republic, Tom Tingle)
Associated Press
An airliner is distorted by the heat waves rising up from the north runway at Sky Harbor International Airport in Phoenix on Friday, June 28, 2013, the hottest day of the year so far. (AP Photo/The Arizona Republic, Tom Tingle)
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