1. This week began with Memorial Day. Tonight, we start by honoring another kind of national sacrifice.

The Memorial Glade at the 9/11 Memorial acknowledges the unsung heroes, largely rescue and recovery workers, whose illnesses and deaths have come years after the towers collapsed.

A pathway is flanked by six monoliths, inlaid with steel from the towers. The dedication comes 17 years to the day after the cleanup of ground zero officially concluded.