Complex sentence: Inviting Al Rothstein to apply with them as well as Norda Cantrell, who would codename himself Northwind, all four would be turned down due to their age and inxperience.
Split into simpler sentences: Inviting Al Rothstein to apply with them as well as Norda Cantrell, who would codename himself Northwind. All four would be turned down due to their age and inxperience.