Picture acknowledgements

© Robert Harding/plainpicture

© DmZ/Shutterstock.com

© hddigital/Shutterstock.com

© cate_89/Shutterstock.com

© Dmitriy Yakovlev/Shutterstock.com

© MaxBaumann/iStock.com

© KLH49/iStock.com

© Jeffrey B. Banke/Shutterstock.com

© Drbouz/iStock.com alpha openers