BUBBLE WRAP. Engineers Alfred Fielding and Marc Chavannes came up the idea for bubble wrap while working on a new type of textured wallpaper in 1957. By sealing two shower curtains together, they trapped a layer of bubbles.
Immigration and Customs Enforcement. Special agents at Immigration and Customs Enforcement, the largest investigative agency in Homeland Security, are classified as criminal investigators. They start at GL-7 with an annual base salary range of $33,829 to $42,055, or GL-9 with an annual base salary of $42,948 to $55,413.
Average Salary. A January 2011 report by the U.S. Office of Personnel Management shows that the average salary of law enforcement agents is as low as $28,201 annually at the grade three level and as much as $61,031 annually at the grade 10 level.verage Salary. A January 2011 report by the U.S. Office of Personnel Management shows that the average salary of law enforcement agents is as low as $28,201 annually at the grade three level and as much as $61,031 annually at the grade 10 level.