The Washington Post is reporting the size of the government database on terrorism suspects has quadrupled in size over the past four years. Each day, thousands of pieces of intelligence information from around the world are fed into the database known as TIDE — for Terrorist Identities Datamart Environment. This includes field reports, captured documents, news from foreign allies and sometimes idle gossip. The database is used to decide what names to put on watchlists and no-fly lists. This marks the first time foreigners and U.S. citizens are combined in an intelligence database. The bar for inclusion is low, and once someone is on the list, it is virtually impossible to get off it.