Historian Tom Holland has adapted Homer, Herodotus, Thucydides and Virgil for BBC Radio. His other history books include Rubicon, Persian Fire and The Forge of Christendom.
Sadie Holland /
First lady Michelle Obama tends to the presidential garden during the third annual White House kitchen garden fall harvest in October 2011. The last vegetable garden planted at the White House was Eleanor Roosevelt's victory garden.
Pablo Martinez Monsivais/AP