evidence: Since the mid-1990s, new technologies have emerged that allow people to interact and share information through the Internet. Often called "social media," these platforms enable people to connect in ways that were non-existent, or widely unavailable 15 years ago. Examples of social media include blogs, chat rooms, discussion forums, wikis, YouTube channels, LinkedIn, Facebook, and Twitter. Social media can be accessed by computers, tablets, smart and cellular telephones, and mobile telephone text messaging (SMS). [...] The United States has been free of a national debt for only two years, 1834 and 1835. In its first year, 1790, the country faced a debt of $75 million. From FY1998 to FY2001, the federal government ran budget surpluses. Since then, the budget has returned to deficit, and the debt had risen to $7.5 trillion by 2009. It rose to a high of 108.6% of gross domestic product (GDP) at the end of World War II; declined to a post-World War II low of 23.8% of GDP in 1974; and, then, rose to another high of 49.5% of GDP in 1993. [...] Problems since 1990 with the rail delivery of coal.