From a young girl who wants to change the world, to parents who lost their daughter in 9/11, these letters are heartbreaking and beautiful

Barack Obama: read five letters written to the former US president

Two years after Barack Obama left the White House, a collection of the post and his replies have been published in a book, To Obama: With Love, Hate, Joy and Despair, by Jeanne Marie Laskas

The experience changed the direction of her life and her sense of her place in the world

If the president actually wrote back to the person [who wrote the letter you picked], you felt high

From a young girl who wants to change the world, to parents who lost their daughter in 9/11

Heartbreak and gratitude: read 5 letters written to Obama, and his replies