Again, there is a tendency for historical shocks to erupt with reversals from thousand level benchmarks in the DJIA. This subject is overviewed in my Stock Market Crash Alert.
In 1990, following a mid-July reversal from Dow 3000, Saddam Hussein invaded Kuwait:
(The DJIA closed at 2999.75 two days in a row on July 16th and 17th and did not close above the 3000 mark for the first time until 1991. On July 17th, Saddam Hussein gave a speech in which he first threatened Kuwait.)
In 2001, with a reveral from Dow 10,000 in early-September, 9/11 occurred:
Obviously, at the current juncture, North Korea needs to be on our radar given the rogue nation's imminent missile test
I am not offering an explanation here for why this phenomenon of mass psychology exists and repeats itself. However, I do believe that the answer as to why will be key to human understanding of reality and our place in the universe. In this light, please take a moment and watch the following video, History's Hidden Engine: