Pipe bomber hits bio lab: Feds probe attack in Watertown By Casey Ross, Jennifer Rosinski and Tom Farmer Friday, August 27, 2004 A pipe bomb ripped through a biotech research lab in Watertown early yesterday, igniting fears of terrorism as federal agents combed through the debris in a search for evidence, law enforcement sources said. The bomb exploded in the darkened lab of Amaranth Bio Inc. at 3:40 a.m., blasting out windows from floor to ceiling in a Pleasant Street office building that houses a half-dozen companies. ``There's no reason to believe it's a terrorist act, but there is reason...