DEERFIELD, Ill.--(BUSINESS WIRE)--Walgreens Boots Alliance will be a key sponsor of the USA Pavilion at the upcoming world’s fair in Milan, which will take place from 1 May to 31 October 2015. Under the theme “Feeding the Planet, Energy for Life”, Expo Milano 2015 will look at how countries generate healthy, safe and sufficient food for everyone in the decades to come, while respecting the planet and its environment.