My take on the latest plan to halt the spread of the Asian carp to the Great Lakes--the six-mile kill zone on the Sanitary and Ship canal--is published at http://www.suntimes.com/sports/outdoors/1913018,CST-NWS-bowman01.article as part of the Sun-Times coverage of the plan.
One of the reasons I don't think the agencies involved have earned the right to use such a measure is this photo. It's Gregory Hamilton (he's behind his grandson, Martise Hardeman) with a bighead carp caught from Columbus Park lagoon on July 3. Asian carp are well proven to already be in Chicago.
Not to mention this project to stop the spread of Asian carp has been bungled since its beginning, primarily by the Army Corps of Engineers.