Pressure cooker under his arm, Hisham Bedri, a Sudanese American Muslim, wondered if he could be viewed with suspicion as he walked across the MIT campus early one Friday morning, less than a month after the Boston Marathon bombing.
But Bedri pushed the thought out of his mind. He was doing nothing wrong. The pressure cooker was required to sterilize the testing equipment that his graduate-level course, Evaluating Technology for Developing Countries, was using to measure water quality. He
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