A word of warning
AA sells tickets with LH connections but you can’t check in for that flight online using LH nor AA or at the Airport with AA.
they want me to physically get my BP in Frankfurt
1h25m from T2 to T1 with a detour to check in and pick up my BP - to a flight that by then I probably will have missed.
great service AA
BTW is there a capable LH service desk at DFW that possibly could help me?