Another option. Go to the interview and get the interview experience. Let them offer you the job and then make the decision. Don't make any decisions before you have to. Leave your options open for as long as you can. If they offer you the job and you say no you have probably burned that bridge so keep that in mind. You might also talk to your current employer and see what they say about a leave of absence for a year or so. Go fly for ASA then if you don't like it go back to where you are working now.