When Smoke Shrouded Washington

IMAGE: The US Capitol building -- the home of the US House of Representatives and the US Senate -- is shrouded in haze and smoke in this view from the National Mall in Washington, DC, here and below. Photograph: Leah Millis/Reuters

IMAGE: A person runs on the hazy National Mall. Photograph: Amanda Andrade-Rhoades/Reuters

IMAGE: A plane flies over the haze shrouded Washington Monument. Photograph: Amanda Andrade-Rhoades/Reuters

IMAGE: Members of the US Marines ceremonial guard rehearse amid a shroud of haze and smoke near the Lincoln Memorial reflecting pool on the National Mall. Photograph: Joey Roulette/Reuters

IMAGE: The US Marine Corps War Memorial can be seen at the National Mall. Photograph: Leah Millis/Reuters

IMAGE: American flags flutter in front of the sun shrouded in haze in Washington, DC. Photograph: Amanda Andrade-Rhoades/Reuters

IMAGE: The Lincoln Memorial shrouded in haze and smoke in this view from the National Mall. Photograph: Leah Millis/Reuters

IMAGE: Downtown Washington, DC shrouded in haze and smoke. Photograph: Amanda Andrade-Rhoades/Reuters

IMAGE: A person on a mini bike wears a mask in Washington, DC. Photograph: Amanda Andrade-Rhoades/Reuters

IMAGE: Tour groups relax in the shade near the US Capitol. Photograph: Amanda Andrade-Rhoades/Reuters

IMAGE: Haze and smoke blanket New York City. Photograph: Andrew Kelly/Reuters

IMAGE: Haze and smoke linger over midtown Manhattan as seen from Fort Lee, New Jersey. Photograph: Mike Segar/Reuters