Thanks in part to advances like email, Facebook, and Twitter, mail carriers will be all but obsolete in the not-so-distant future. By 2022, the US Bureau of Labor Statistics projects a 28% decline in postal-service jobs, totaling around 139,100 fewer positions. Mail carriers aren't the only ones whose jobs are disappearing. Technology and market shifts have affected a wide range of fields. Based on the BLS's occupational outlook data, here are 15 American jobs that are on their way out. 1. Printing worker According to the BLS, printing workers inspect random samples during print runs to identify problems and make...