Tunnel Boring Machines (2018)
I know this is probably a very stupid idea, but I was thinking what if we shot ourselves out of rail guns into the air into a bullet shaped craft with fins?You could be shot out of one rail gun in San Francisco, glide for awhile, fall to the earth and caught by a “reverse” railgun in San Jose.It'd be cheaper and safer than planes since no need to carry fuel or an engine on board, and could have an emergency parachute incase something went wrong.Or maybe I've been dreaming about Kerbal Space Program projects too much lately. (I'm fully expecting to be flamed and jided for this)