There was a very interesting programme on Radio 4 this morning but, as is always the way with these things, I was driving around doing errands so I only caught snatches of it. Thank goodness, then, for BBC Radio’s Listen Again service, which gives folks like me a second chance to listen to a programme via the web for a couple days after the broadcast. In my case, it was a 30 minute documentary called ‘Unsung Heroes’, which records and feelings of the ham radio volunteers in and around New York, who made a quiet but essential contribution to the 9/11 emergency response. Having learned a fair amount about amateur radio whilst on holiday, I was interested to learn of the part these volunteers played in helping in the aftermath of the attacks. Should you wish to hear the same programme – and have Real player – simply click here for a streamed version.