This template's initial visibility currently defaults to autocollapse, meaning that if there is another collapsible item on the page (a navbox, sidebar, or table with the collapsible attribute), it is hidden apart from its title bar; if not, it is fully visible.
To change this template's initial visibility, the |state= parameter may be used:
{{U.S. chemical weapons facilities|state=collapsed}}will show the template collapsed, i.e. hidden apart from its title bar.{{U.S. chemical weapons facilities|state=expanded}}will show the template expanded, i.e. fully visible.
This template was designed for modern chemical weapons facilities (those operating after the Chemical Weapons Treaty came into effect). Numerous other bases both at home and overseas stored chemical weapons in the era between WWI and the 1969 ban on transporting the weapons which locked them into their locations.