Good evening. I'm John Yang. Jeff Bennett and Omna Nawaz are away. On the news hour tonight, the Supreme Court completes another historic term with rulings that expand presidential authority and could have far-reaching consequences for the future of American democracy.

As extreme heat becomes a dangerous new normal,

doctors warn that high temperatures are opposing more risks to the human body.

The effects of extreme heat might not show up right away as a diagnosable health condition,

but they could be taking a silent toll at the cellular

and the molecular level. And on this 4th of July, we visit the National Museum of the Marine Corps

commemorating the Corps' 250-year history.

Music 50-year history.

Welcome to the News Hour.

As Americans celebrate their freedom on this Independence Day, President Trump is celebrating a decisive win for his domestic agenda. His second term legislative wish list, officially entitled

The One Big Beautiful Bill Act, is now law.

Given the gavel that used to cast the legislation,

the president signed the sweeping tax and spending cuts surrounded by congressional

Republicans.

He touted the bill as one having a generational impact.

It includes the largest tax cut in American history, the largest spending cut, $1.7 trillion,

and yet you won't even notice it just waste,

fraud and abuse in American history.

So you have the biggest tax cut, the biggest spending cut, the largest border security investment.

The new law is unprecedented in many ways, extending the tax cuts of Mr. Trump's first term, along with others, to the tune of

$4.5 trillion, adding another $1.4 trillion in spending cuts, and according to the Congressional

Budget Office, adding a record $3.2 trillion to the deficit over the next 10 years.

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