This year Denver International Airport marked twenty years of operations. In addition the new Westin hotel at the airport opened at the south end of the terminal. On Day 21 of Thirty Days 2015, I took advantage of clear skies to capture an image of the airport at sunset. From a vantage point on the east side of the airport I waited for the sunset and the lights to come on in the main terminal building. In the distance are the Rocky Mountains and on some of the higher peaks fresh snow blowing with the high winds.