In the wake of Martin Luther King, Jr. Day, there's a very good open letter by Anant Raut, a lawyer who represents five Guantanamo detainees pro bono, over at Salon.com (you may have to click through an ad to read it). His final closing lines are quite good:

The Rev. Martin Luther King Jr. once wrote, "Injustice anywhere is a threat to justice everywhere." It is my belief that the true test of a nation's commitment to liberty occurs not when it is most readily given, but rather when it is most easily taken away.