Hot-air balloon pilot Richard Varney typically spends his weekends transporting tourists around central Massachusetts in a huge, multicolored balloon. But on a recent Sunday, Varney drove to a local community college and learned to fly a different type of aerial vehicle. “I want to try something new,” he said as he watched an instructor demonstrate how to steer a $2,000 drone equipped with a camera. “This could help me launch a side business tak
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