I finally got through on the US phone line this morning after about 2 hours of wait time (got hung up on, had to call again). During that time, I was able to get the website to offer rebooking options. What the LH website was offering wasn't going to get my husband home in a timely fashion, but the phone agent was very helpful in acommodating him on the desired AC flight.
What a mess! Everytime we fly Lufthansa, we end up dealing with some sort of strike or "threat" of strike.
Good luck to all of you still dealing with this.