Amazon Prime Air has become rather coy over its drone delivery program in the USA two years after first gaining approval from the Federal Aviation Administration (FAA) to start testing in August 2020. Now the company has received permission from the Federal Communications Commission (FCC) to conduct drone testing using millimeter wave spectrum over two years, with plans to start deliveries in two cities this year, followed by further assessments at three other locations in the country. Curiously, Amazon requested that most details of its Special Temporary Authority (STA) permit be kept confidential, citing competitive concerns. But it had to make public that the spectrum would be in the range 60.86-62.78 GHz, using transmit power of 100mW, and that the…