In case you hadn't noticed, the US Federal Government has been shut down because of policy differences between two branches of the government. Said shutdown affects only non-essential government workers at this time, but if it continues too long, we may all notice it.
What is really surprising is how many federal government shutdowns there have been over the last 40 years. I certainly hadn't been aware of that many, and if asked, I might have guessed 5. The chart above quickly dispels that notion.
PBS has an in-depth article that discusses these shutdowns, their causes, and their outcomes. Quite a bit of information is available in tabular form and makes for deucedly interesting reading. Meanwhile, place your bets as to how long this current shutdown will last. My money's on a new record.