Good morning! Here is the tech news you need to know this Tuesday.1. US president Donald Trump issued an executive order blocking Singapore chipmaker Broadcom's takeover of its rival Qualcomm, citing national security concerns. At $116 billion (83.5 billion), it would have been one of the biggest acquisitions in tech of all time.2. A judge has ruled Yahoo will have to face a lawsuit that claims most of its 3 billion users were affected by a series of data breaches between 2013 and 2016. The judge ruled against Verizon, Yahoo's parents, in its attempt to dismiss most of the claims.3. Apple has bought Texture, a digital newsstand described as the "Netflix of publishing" as it doubles down on its News offering. The service gives access to around 200 magazines for $9.99 a month.4. Dropbox wants to raise up to $648 million (467 million) during its upcoming IPO at a $7.5 billion valuationlower than its previous $10 billion valuation. The firm plans to list 36 million shares price between $16 and $18.5. Ride-sharing company Lyft said it made $1 billion (720 million) in revenue last year, and that it is growing faster than rival Uber. Like Uber, Lyft remains unprofitable.6. Flying vehicle company Kitty Hawk, backed by Google cofounder Larry Page, is testing self-piloting taxis in New Zealand, according to the New York Times. The country has agreed to test the autonomous planes as part of an official certification process.7. Chinese commerce giant Alibaba has upped its stake in ride-sharing startup Ofo with an $866 million investment, according to China Money Network. Ofo's other major shareholder is ride-sharing giant Didi Chuxing.8. Apple exec Eddy Cue has explained the company's attitude to free speech, saying it's important "but not everything." Cue explained the company would ban apps that sold guns, but wouldn't ban the NRA's TV app because it doesn't violate company policy.9. Australia's defence department has banned officials from using the Chinese app WeChat, shortly after phasing out Chinese phones. The department is currently reviewing WeChat's security processes, and it may be permitted for use once cleared.10. Snapchat will start featuring third-party AR lenses in its carousel of filters after opening up Lens Studio to creators last year. As yet, creators won't be paid for their efforts.Join the conversation about this storyNOW WATCH: These bionic arms make kids feel like superheroes Click here to read full news..