The wind energy market in the U.S. will stay alive with or without an extension of the Production Tax Credit (PTC), say executives from eight of the largest wind turbine manufacturers with a U.S. presence. During a June 6 session focused on large wind turbines during Windpower 2012, executives from Gamesa, GE, Goldwind, Mitsubishi Power Systems, Nordex, Siemens, Suzlon and Vestas expressed that they view the U.S. wind market as a strong one.