09:15Letter from America by Alistair CookeThe secret of longevityBBC Radio 4 Duration: 14 minutes Sun 27th Jul 1975, 09:15 on BBC Radio 4 ExtraAvailable for over a yearListen nowSummer heat in Manhattan. And a look at different approaches to ageing. Show more ContributorsPresenter:Alistair CookeGenresFactualArts, Culture & the MediaBrandLetter from America by Alistair Cooke Source: BBC Online