US Secretary of State Antony Blinken is on a visit to China - offering a mixture of friendliness and warnings. We assess US-China relations and ask what, if anything, this visit could change.

Also in the programme: the father of a US-Canadian aid worker killed in Gaza tells us the message he'd like today’s memorial service to send to the world; and the possible dangers of yet another artificial sweetener - one that's hard to avoid if you like soft drinks, cakes or chewing gum.

(MAGE: U.S. Secretary of State Antony Blinken arrives at the Beijing Capital International Airport, in Beijing, China, April 25, 2024 / CREDIT: Mark Schiefelbein / Pool via REUTERS)