I am a US national returning from India and going to Washington DC. On my 8+-hour layover at FRA, I plan to take a train ride into Aldstadt. I may need to check in a small bag at the airport storage for the duration. Could anyone tell me into which terminal the flight from India would arrive, and from which terminal my Washington flight would depart? If they are different terminals, then it would be tricky to leave the bag in one terminal, then come back to pick it up and go to the other terminal. What about time required to do all this? Thanks very much.