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Actually blocks the shorter wave lengths and the visible spectrum that you and i see. it leaves just the red wave lengths. but the problem is, when that smoke settles to the surface of the earth and that's when it starts to impact the quality of our air. that's also the issue that we've been contending with. just people reaching out to me on social media talking about how they can literally smell the smoke from the wildfires from nova scotia. we have an air quality alert from new jersey and southeastern sections of pennsylvania including baltimore and pittsburgh. but check this out. you got to...

It and the red, visible light and the longer wave lengths and the real problem is when it settles to ground. kate, you know, that is the unhealthy air that we all breathe. >> yeah. it's a good depiction of what you're dealing with. get out of that smoke now, derek. thank you very much. >> rahel. >> well done. well done. >> well, take off your shoes, remove any liquids and any electronics and now step on the scale. that is the change coming to air new zealand. it is asking the airline to weigh pass edgers on international flights out of auckland through july. they say they want to gather data o...

1800s -- >> i'm sorry. i'm thinking of saturn. >> that's why i love this picture so much. astronomers in the 1800s suspected neptune might have had a ring. astronomers suspected it, but it wasn't confirmed until voyager ii imagined it. but the rings are very dark and very thin and they're not much to talk about in the visible light. when i saw this image, it struck me. i had a very visceral reaction to this because it looked saturn. >> that's why i was confused. >> it is. and the infrared wave lengths, these waves of neptune now stand out beautifully. i was standing next to a planetary astrono...

Knew whatever is out there, we'll see it. >> when i think of it as a layman, what strikes me as extraordinary about this telescope is on the one side, it faces the sun and has this -- the heat that is facing is extraordinary. on the other side, it's facing cold temperatures like you can't imagine. describe how that works. >> the sun shield blanks out the sun and lets it cool down to almost the temperature of cold space. the temperature of the telescope. the 3 metric tons has to get to about 55 degrees kelvin, about minus 361 degrees fahrenheit. we can do that because we're looking at infrared ...

Up reaching nearly three quarters of american households that have tvs. how is that possible? well in april 2016 fcc chair reinstated something called the uhf discount. the details are technical and they involve different wave lengths used to broadcast tv. but it boils down to this. a large portion of the sinclair holdings are low power so they are discounted toward the circulation of market share. joining us from washington to take a closer look at this is washington post media critic eric women pell. >> thanks for having me on. >> this is less about a message they had to read than it is abou...