Joel -
I suspect Steve found lt. Morse's name on the roster of pilots commissioned prior to 11 November 1918. The list is broken down by home state so my first suggestion would be to ask what state he was from and the address that is listed with his name - home town and street are included.
I'd sned a query to his town or county historical office or the State historical commission for a start.
Try
Ancestry.com -- Browser Upgrade for birthdate, family geneology once you know what state he's from. You can often get a toehold by doing that.
If I get a few minutes, I'll poke through a list that may ID if he went to college/university. If so, the rest should be simple for you.
-Mike