If you click on the copyright on the top right hand corner of the page it says this:
This website has been produced under the auspices of the World Press Photo foundation. All photography copyrights are exclusively held by the respective photographers and their representatives. No images may be copied from this website. Contact the World Press Photo office to find out how to get in touch with the photographers.
No material from this site may be copied, reproduced, stored in any retrieval system, or transmitted in any form or by any means electronic, mechanical, photocopying, recording or otherwise, without prior permission in writing from the Stichting World Press Photo, Amsterdam, the Netherlands.
Just try a print screen and copy it into paint and try and resize it there.