![The logo of German tourism group TUI AG, owner of Europe's largest travel company TUI Travel, is pictured on a computer screen in this illustration picture taken in Lavigny May 20, 2012. The logo of German tourism group TUI AG, owner of Europe's largest travel company TUI Travel, is pictured on a computer screen in this illustration picture taken in Lavigny May 20, 2012.](https://c8.alamy.com/comp/2CWK066/the-logo-of-german-tourism-group-tui-ag-owner-of-europes-largest-travel-company-tui-travel-is-pictured-on-a-computer-screen-in-this-illustration-picture-taken-in-lavigny-may-20-2012-reutersvalentin-flauraud-switzerland-tags-travel-business-2CWK066.jpg)
The logo of German tourism group TUI AG, owner of Europe's largest travel company TUI Travel, is pictured on a computer screen in this illustration picture taken in Lavigny May 20, 2012.
![The logo of German tourism group TUI AG, owner of Europe's largest travel company TUI Travel, is pictured on a computer screen through sunglasses in this illustration picture taken in Lavigny May The logo of German tourism group TUI AG, owner of Europe's largest travel company TUI Travel, is pictured on a computer screen through sunglasses in this illustration picture taken in Lavigny May](https://c8.alamy.com/comp/2CY6KAR/the-logo-of-german-tourism-group-tui-ag-owner-of-europes-largest-travel-company-tui-travel-is-pictured-on-a-computer-screen-through-sunglasses-in-this-illustration-picture-taken-in-lavigny-may-20-2012-reutersvalentin-flauraud-switzerland-tags-travel-business-2CY6KAR.jpg)
The logo of German tourism group TUI AG, owner of Europe's largest travel company TUI Travel, is pictured on a computer screen through sunglasses in this illustration picture taken in Lavigny May
![The Greek website of German tourism group TUI AG, owner of Europe's largest travel company TUI Travel, is pictured on a mobile phone in this illustration picture taken in Lavigny May 20, The Greek website of German tourism group TUI AG, owner of Europe's largest travel company TUI Travel, is pictured on a mobile phone in this illustration picture taken in Lavigny May 20,](https://c8.alamy.com/comp/2CYGDM7/the-greek-website-of-german-tourism-group-tui-ag-owner-of-europes-largest-travel-company-tui-travel-is-pictured-on-a-mobile-phone-in-this-illustration-picture-taken-in-lavigny-may-20-2012-reutersvalentin-flauraud-switzerland-tags-travel-business-2CYGDM7.jpg)