FILE - In this July 14, 2009 file photo, a cluster of windmills catch the wind blowing on Stetson Mountain, in Range 8, Township 3, Maine. A group of wind power executives, meeting in Atlanta, says a stalled effort to renew federal tax credits for the industry is creating instability and financial concerns. Meanwhile, presidential aides Karl Rove and Robert Gibbs spoke with executives at their annual conference about bipartisan support for the tax credits but a tough political climate between now and the November presidential election. (AP Photo/Robert F. Bukaty, files)