The FCC plans to allocate more unlicensed spectrum for Wi-Fi to improve performance in crowded public places and in homes, looking to head off a future spectrum crunch. Wi-Fi users will share that spectrum with the U.S. Department of Defense and other government agencies, U.S. Federal Communications Commission Chairman Julius Genachowski announced on Wednesday at International CES in Las Vegas. The spectrum will be in the 5GHz band, one of the two bands where Wi-Fi is already used.