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Walt Arfons: 1916-2013

No one seemed to know why the two brothers stopped talking, but their resulting rivalry led to some of the fastest cars ever built, two of which went more than 600 mph. Walt Arfons battled his half-brother Art on the Bonneville Salt Flats and at dragstrips across the country, but the pair rarely spoke over the course of one of the longest and most intense motorsport rivalries ever. Walt and Art started out working together, building a three-wheeled dragster in their native rural Ohio in 1952.

Video: The Porsches of Rennsport Reunion IV gather for a family photo

Just before this weekend's Rennsport Reunion IV at Mazda Raceway Laguna Seca, 40 Porsches lined up for a family photo. Of course, the picture included the requisite 356s, Speedsters and RSKs. In addition, fans were treated to the sights and sounds of 914s, 911s, Spyders and Carreras from every era of racing.

The Ferrari 250 GTO and TR

Sitting in a line under the unforgiving rays of the sun was an astonishing sight: A 375MM Ferrari followed by a four-cylinder Ferrari 875 and three of the most famous cars of all: A 250TR, 250GTO and a 250LM, the last car to win Le Mans for Ferrari. They were not roped off, and the enthusiastic but respectful attendees were free to get as close as they wanted to better admire and take photographs of them. But this was only the beginning.