"The Thin Blue Line has been diminished over the past few years," Floyd said. "Your service and sacrifice is highly valued. You may not hear the words 'thank you' enough, but your nation has built a memorial in your honor."
So far in 2012, police fatalities have fallen sharply. Forty officers have perished in the line of duty, a 40% drop compared to 2011. Also, firearms-related police deaths have fallen 55% in 2012, Floyd said.
Homeland Security Secretary Janet Napolitano and Attorney General Eric Holder gave brief speeches to the sea of officers, survivors, and other dignitaries who filled Judiciary Square for the vigil.
"In both memory and spirit, they are still with us," Holder said of the fallen officers. "No words can ease the grief for each terrible loss we celebrate this evening. Yet I believe we can take some measure of comfort in the enduring impact each one of them has had. "
Napolitano said the candles "illuminate this sacred ground" and offered "our eternal gratitude, our blessings, and our respect."