Bradley Manning's letter, entitled The Next Stage of My Life, was signed with a handwritten signature in the name of Chelsea Manning.
The letter was broadcast on NBC's Today show as Manning's lawyer revealed the soldier's desire to live life as a woman.
More top news
The new scheme also aims to help prevent the growth of diabetes, of which there are three million sufferers in the UK.
Up to 10cm of snow could hit parts of Britain today as forecasters predict a cold snap in the lead-up to the New Year.
Hacking group Lizard Squad claimed responsibility for the attack which left thousands struggling to access their accounts for hours.