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When he addresses a joint session of Congress Tuesday night, President Trump is expected to outline some of his plans for rebuilding the nation's crumbling infrastructure.

And he will likely reiterate his commitment to "buy American and hire American," as he repeated often during the campaign and since taking office last month.

But what exactly does that mean for state departments of transportation and the contractors who build transportation projects?

Billionaire investor Wilbur Ross was confirmed as President Trump's secretary of Commerce on Monday night by a vote of 72 to 27 in the U.S. Senate.

Ross will divest from the private equity firm he founded, WL Ross & Co., as part of his ethics agreement upon entering government service. He will retain other financial interests but has pledged not to take any action as commerce secretary that would benefit a company in which he holds a stake.

It's become an annual tradition for NPR to host a live band in our studios for a full day. This year, we upped the ante and invited around 70 musicians from Washington, D.C.'s National Symphony Orchestra to play the musical interludes between stories on All Things Considered.

The private company SpaceX has announced that it plans to send two passengers on a mission beyond the moon in late 2018.

If the mission goes forward, it would be the "first time humans have traveled beyond low Earth orbit since the days of Apollo," as NPR's Nell Greenfieldboyce told our Newscast unit.

The two private citizens approached the company about the idea and have already paid a sizable deposit, CEO Elon Musk told reporters in a conference call. These private individuals will also bear the cost of the mission.

It's been five years since the death of Trayvon Martin — and the outrage that sparked the Black Lives Matter movement.

Martin — 17 years old, black and unarmed — was shot by George Zimmerman, a neighborhood watch volunteer in Sanford, Fla.

President Trump's initial budget proposal isn't enough to expand the military in the way he proposed.

Trump campaigned on the need to add tens of thousands more troops to the Army and Marine Corps, field a Navy with 350 warships or more and also to upgrade the Air Force. The $54 billion he's seeking to increase the Defense Department budget this year would represent a funding boost — but not one that would pay for an expansion on the scale Trump endorsed.

Attorney General Jeff Sessions pledged to devote federal resources to combat violent crime and to shore up morale across the nation's police departments, on Monday in his first on-the-record briefing as the top U.S. law enforcement officer.

When it comes to climate change, we often think of the cars we drive and the energy we use in our homes and offices. They are, after all, some of the biggest contributors to greenhouse gas emissions. But what about the toast you ate for breakfast this morning?

A new study published Monday in Nature Plants breaks down the environmental cost of producing a loaf of bread, from wheat field to bakery. It finds that the bulk of the associated greenhouse gas emissions come from just one of the many steps that go into making that loaf: farming.

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AUDIE CORNISH, HOST:

Mahershala Ali won the Academy Award for best supporting actor for his role in Moonlight. NPR's Kelly McEvers spoke to Ali in October about his experience working on the film, which won the Oscar for best picture. This story originally aired on Oct. 21, 2016 on All Things Considered.

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