Sir, - I was appalled to learn that the American billionaire Denis Tito had paid $20m to travel in space. There are millions of people in the world without food or shelter - how can this man justify spending $20 million to indulge a whim of his own? Why did he not donate this money to charity, and thus benefit many people who are in dire need of help? I think that what he has done is absolutely unconscionable. - Yours, etc.,
Jennifer Desmond, Quinn's Road, Shankill, Co Dublin.