In a spot where many homeless people have spent cold-long nights, beneath a bridge Downtown, Pittsburgh, shadows are cast on the wall during a memorial service for the six homeless individuals who died in 2007 on the streets of the city. The memorial service was part of the National Coalition for the Homeless's National Homeless Persons' Memorial Day, which is held each year on the first day of winter, the longest night of the year, to call attention to the tragedy of homelessness.