Tech Giants Challenge Trump Immigration Ban

Apple, Facebook, Google and other US technology companies have filed a legal challenge arguing that President Trump's travel ban inflicts significant harm on business. The statement to an appeals court in San Francisco said the currently-suspended ban on travellers from seven mainly-Muslim countries made it hard for US companies to attract talent. We hear from our correspondent in Washington and a Silicon Valley investor about his concerns.

Also in the programme: Angela Merkel's party falls to second place in German popularity poll; And the voracious caterpillar spreading across Africa.

(Image: A sign reading "Tech Has No Borders - Immigration Innovation" held up at a walkout of Comcast employees in Philadelphia. Credit: Jessica Kourkounis/Getty Images)