Remembering 'Welcome Back, Kotter'
August 14, 2012 -- Updated 2011 GMT (0411 HKT)
"Welcome Back, Kotter" fans are mourning the loss of Ron Palillo, who died of a heart attack Tuesday at 63. As Arnold Horshack, one of the "Sweathogs," on the ABC series, Palillo was beloved by viewers for his unique laugh and "Oooh! Oooh!" catchphrase.
John Sylvester White
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