Currently, the Pentagon Pizza Index is at level 4, down a bit from the previous two days.

The Pizza Index is a popular folk indicator because Americans often consider pizza as overtime fast food.
So, during sensitive times, as long as pizza shops near the Pentagon suddenly get busy late at night, people start to speculate whether they are holding all-night meetings to plan big events again.
This is somewhat accurate—before the outbreak of the Iraq War in 2003, pizza orders around the Pentagon surged by over 300%, and the Pizza Index rose to level 1.
During the US-Iran standoff in February, the index was also raised to level 3.