Please try to keep this navbox limited to the most important articles only. There are hundreds of articles in Category:Manhattan Project. Let's keep this navbox more focused than that. Don't be afraid to delete something if you find it irrelevant.
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:
{Manhattan Project|state=collapsed} will show the template collapsed, i.e. hidden apart from its title bar.
{Manhattan Project|state=expanded} will show the template expanded, i.e. fully visible.
