Hello and welcome to NewsHour from the BBC World Service.
We're coming to you live from London.
I'm Leila Nafu.
Later in the programme,
we'll be hearing about the glitz and the glamour of last night's Oscars ceremony in Los Angeles,
why whistleblowers at social media companies are raising the alarm about algorithms used to keep people engaged with their products,
and how babies are capable of deception at a much earlier age than previously thought.
But first, with the US-Israeli war against Iran now into its third week.
President Trump now appears to be homing in on one short-term aim,
restoring the free passage of tankers carrying oil and liquefied natural gas through the waterway,
the Strait of Hormuz, to Iran's south.
Tehran's effective closure off the strait through threats and attacks on ships has been a crucial weapon in its arsenal,
destabilising global energy supplies and prompting President Trump to call for US allies to help reopen it.
He warned that NATO would face a very bad future.
if there was, as he put it, no response or a negative response.
Here he is speaking to journalists on board a very noisy Air Force One
as he was travelling from Florida to Washington.
We are talking to other countries about working with us for the policing of being straight.
Remember, as an example, medications in NATO countries.
We're always there for NATO.