On ea6bflyr's question 3:
I didn't see anyone mention this; I think John Ericsson invented the cannon that burst while secnav and secwar were watching the demo. That incident kind of strained his relationship with the government a little. Thankfully, someone [Gustavus Fox?] prevailed on Gideon Welles to bring Ericsson on in the Navy's moment of need: he designed the USS Monitor.
I didn't see anyone mention this; I think John Ericsson invented the cannon that burst while secnav and secwar were watching the demo. That incident kind of strained his relationship with the government a little. Thankfully, someone [Gustavus Fox?] prevailed on Gideon Welles to bring Ericsson on in the Navy's moment of need: he designed the USS Monitor.