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.
How to Become a Homeland Security Agent. As part of U.S. Immigration and Customs Enforcement (ICE), Homeland Security agents are responsible for conducting investigations into terrorist threats and behavior, the smuggling of illegal substances into the country, illegal immigration, and other issues that affect national security.