Acknowledgements

The authors and publishers acknowledge the following sources of copyright material and are grateful for the permissions granted. While every effort has been made, it has not always been possible to identify the sources of all the material used, or to trace all copyright holders. If any omissions are brought to our notice, we will be happy to include the appropriate acknowledgments on reprinting and in the next update to the digital edition, as applicable. Key: U = Unit.

Text

U2: We are grateful to Gabriella Scampone for granting us permission to write the text about her.

Photographs

All photographs are sourced from Getty Images. Snapshots taken from American Empower Student’s Book Level 1 & 2; Snapshots taken from American Empower Documentary videos & ebooks; Don Mason; Aberham/Photolibrary/Getty Images Plus; YinYang/E+; Thomas Barwick/ DigitalVision; cdbrphotography/iStock/Getty Images Plus; Stephen Frink/The Image Bank; Student’s Book: U2: DavidMadison/Photographer’S Choice RF; Bluebarronphoto/iStock/Getty Images Plus; Alexander Yates/Moment Open; Piotrsurowiec/iStock Editorial/Getty Images Plus; Caiaimage; Hill Street Studios/Digitalvision; Monkeybusinessimages/iStock/ Getty Images Plus; Image Source/Digitalvision; Antonioguillem/iStock/Getty Images Plus; Fstop123/E+; Shironosov/iStock/ Getty Images Plus; SDIProductions/E+; Lightfieldstudios/iStock/Getty Images Plus; Argument/iStock/Getty Images Plus; Zephyr18/iStock/Getty Images Plus; Jacoblund/iStock/Getty Images Plus; Westend61; Peopleimages/E+; Cepre Map / iStock/Getty Images Plus; Jlgutierrez/E+; Anabgd/iStock/Getty Images Plus; ChevanonWonganuchitmetha/Eyeem; Antonio_ Diaz/iStock/Getty Images Plus; KlausVedfelt/Digitalvision; Tom Merton/Ojo Images; Drazen_/E+; JohnnyGreig/E+; Flashpop/ Digitalvision; Emirmemedovski/E+; Yacobchuk/iStock/Getty Images Plus; Andresr/E+; Workbook: U2: Courtney Hale/E+; Westend61; Gary Conner/Photodisc; MelYates/DigitalVision; Ron Levine/DigitalVision; R.M. Nunes/iStock/Getty Images Plus; PhotoAlto/Eric Audras; ER Productions Limited/DigitalVision; Hill Street Studios/DigitalVision; Snapshots taken from A2 Photocopiable Sample Material.

The following photograph is from another source. Student’s Book- U2: © Gabriella Scampone and © Everglades Holiday Park: photograph reproduced with kind permission of Gabriella Scampone. Cover Photography by Franz Aberham/Photolibrary/Getty Images Plus/Getty Images. Commissioned photography by Gareth Boden.

Illustrations

Adrian Barclay; Mark Bird; Mark Duffin; John Goodwin; KJA Artists; Dusan Lakicevic; Jerome Mireault; Gavin Reece; Martin Sanders; David Semple; Sean Sims; Marie-Eve Tremblay; Gary Venn; Roger Penwill; Victoria Woodgate. Typeset by QBS Learning.