It’s the controversy that keeps on controversing: The U.S. Navy wants to test underwater mid-frequency sonar. Marine advocates say such testing effs up whales and other marine mammals. Repeat. (Grist has been writing about this issue since 1999, and we have never reused a headline. Thank you.) Anyhoodle, here we go again: last month, a federal judge ordered the Navy to stop using mid-frequency sonar off the California coast through 2009; on Friday, a federal appeals court put the kibosh on that decision. “The public does indeed have a very considerable interest in preserving our natural environment and especially relatively scarce whales,” wrote Judge Andrew Kleinfeld. “But it also has an interest in national defense. We are currently engaged in war, in two countries.” And we can’t be too careful — what if the whales are working for the terrorists?