An anonymous reader writes: The vast majority of people who work in IT did everything right: They invested in their education, studied difficult subjects, kept their skills updated. They own homes, raise families and look to the future. But no job is safe, no future entirely secure — something IT workers know more than most. Given their role, they are most often the change agents, the people who deploy technologies and bring in automation that can turn workplaces upside down. To survive, they count on being smart, self-reliant and one step ahead. Over the years, Computerworld reporter Patrick Thibodeau has interviewed scores of IT workers who trained their visa-holding replacements. Though details each time may differ, they all tell the same basic story. There are many issues around high-skilled immigration, but to grasp the issue fully you need to understand how the H-1B program can affect American workers.