15:15Letter from America by Alistair CookeHow ice cream changed AmericaBBC Radio 4 Duration: 15 minutes Wed 21st Apr 2010, 15:15 on BBC Radio 7Available for over a yearListen nowReuben Mattus, the inventor of Haagen-Dazs ice-cream, reminds Alistair Cooke of other immigrants who have shaped America.GenresFactualArts, Culture & the MediaBrandLetter from America by Alistair Cooke Source: BBC Online