Are there any project where the US goverment worked on opening portals to alternate dimensions? I have been wondering if any existed because I watched
that stephen king movie called the myst and I heard the C2C frantic caller on youtube and he said some thing about this.
I believe the Philadelphia experiment had something to do with a war ship entering another dimension while experimenting with invisiblity. Apparently
men dissapeared, some were embedded in the bulk heads and the ship dissapeared for a period of time and ended up a large distance away.
I think your best starting point as Ozweatherman mentioned would be the Philladelphia Project.
There are a number of interesting theories surrounding it including the possible attendance of the great scientific minds of the day such as Tesla and
Einstein.
I think there are a few threads on the Project on ATS so i suggest you do a search and see what comes up.
Keep us posted if you find any other projects involving other dimensions as it is a very interesting subject.