Facebook founder Mark Zuckerberg said: "I grew up with the internet, but only a third of the world is on it today. We are really close to the beginning of this. The majority of people in the world have never seen anything like what you and I would call a computer."
Facebook's bold new look for Android becomes available from April 12.
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It comes after House Republican leaders postponed voting on a compromise immigration measure.
Which? said Amazon and eBay had removed the alarms that failed to sound in test conditions.
Economists worry about a trade war between the United States and its most vital trading partners.