[0:22:15 - 0:22:22] under sea bases but that's another story for another day. In
1972 Naval Facilities Engineering
[1:02:04 - 1:02:12] in U.S. Energy R&D in
1972 and 1975. Further nuclear subterrain patents in 1975 detailed tunnel
[1:03:36 - 1:03:43] techniques in R&D stages. In
1972, the governing board of the National Research Council formed the
[1:16:01 - 1:16:07] Of massive consequence to this investigation, in
1972, Robert Salter of the R&D Corporation
[1:35:29 - 1:35:35] conventional and unconventional tunneling methods, probably started around 1974. Between
1972