The Economist.
Hello, and welcome to the intelligence from The Economist.
I'm your host, Rosie Blau.
Every weekday, we provide a fresh perspective on the events shaping your world.
American science has taken a battering since Donald Trump took office over a year ago.
Now Republicans in Congress are beginning to fight back.
And there's something of a shortage of tenors at the moment.
Not £10 notes, but the higher male voices in a choir.
Our correspondent looks for the key to the problem, and asks whether ensembles may have to change their tunes.
But first...
Just over a week ago, Iran's Ayatollah Ali Khamenei was killed in joint US air strikes.
Now a new supreme leader has been picked.
Mojtaba Khamenei is the son of the last one.
Chosen by a panel of clerics as the battering of the country continues.
With assaults on oil and other energy facilities, and an Iranian response in kind,
a new leader and a new phase of the third Gulf War begins.
The choice of Mojtaba Khamenei as Iran's new supreme leader is a signal of continuity rather than change.
Greg Carlstrom, our Middle East correspondent, is in Riyadh this morning.
The regime intends it to show that it is still intact and it is not willing to bend.
But I think it's also going to be taken by many Iranians as a signal