This story was revised to correct the day of the announcement.
Correction: A previous version of this story misspelled the last name of New Relic's CEO.
The Dow closed at 18,024.17 on Dec. 23, 2014. An earlier version misstated the figure.
This story has been corrected to reflect a change in Nielsen's spending estimate, which had been previously misstated.
The headlines on this story were revised to clarify that the missile was not armed.
This story was revised to show that net sales increased 0.4 percent to $7.33 billion.
This story was revised to delete an outdated reference to Trump's status.
Scott Pruitt is Trump's pick for EPA administrator. An earlier version mischaracterized his status.
The gain under Herbert Hoover was from 1928-29. An earlier version misstated the years.
An earlier version of this story misstated the price of the items in the promotion. Olive Garden's offer starts at $11.99. Prices may be higher for some options.