Last night I had dinner with friends of mine -- a biracial couple with two beautiful biracial children.  We started discussing racism in Maine and across the country.  We agreed that in fifty years since the historic March on Washington for Jobs and Freedom, we've made tremendous progress toward the goals of racial equality and justice.  The presidency of Barack Obama sends a powerful message to every black child that someday he could be President too.  At the same time, the death of Trayvon Martin sends an equally powerful message to mothers and fathers of black children that their sons could be one of the many black youth who are statistically more likely to be victims of violence than white children.  We still encounter racism in our communities and our systems.  Structural  inequalities persist including racial profiling and the terrible problem of over-incarceration.  Mass incarceration is the new Jim Crow as our country locks up more people in total and per capita than any other country, and one in three black men are likely to spend time in prison or jail at some point.  Even in Maine, the least racially diverse state in the country, blacks are twice as likely to be arrested for marijuana possession than whites, even though marijuana usage rates are the same.