Barclays is in an awkward situation that will ring familiar to bankers in the U.S. The U.K. bank has been terminating relationships with money transmitters, including several that wire funds to Somalia, a ravaged country that relies heavily on remittances from immigrants in the West. The bank says it's uncomfortable with the risk and expense of serving these businesses in light of recent fines levied against big financial institutions for anti-money laundering lapses. But now it's being accused of starting a humanitarian crisis.