Arrived home from a trip to Russia followed by a Baltic cruise. Flew home on BA in First Class. We had experienced DME in Moscow, Copenhagen and Heathrow. When we arrived, three jumbo jets arrived about the same time. There were two lines - one for US citizens and one for international travelers. There were 4 and then 5 agents for US and a mere 2 for the international travelers. You can imagine how long it took - the lines snaked forever. I feel pity for anyone having to make a connection and embarrassed, as an American, at the incredibly lousy welcome. I know it was July 4th and it may have been a skeleton crew, but the flights were still coming and the manpower issue was insane. I had nothing like this at the other airports. We should do better.