Photos of the day - February 13, 2015

A staff member holds a 100-carat perfect diamond in a classic emerald-cut at Sotheby's auction house in central London; a visitor stands in front of a 360 degree panorama display by artist Yadegar Asisi that depicts the city of Dresden in the aftermath of the February 13, 1945 Allied firebombing; and, U.S. President Barack Obama looks up as he signs an Executive Order to encourage and promote sharing of cybersecurity threat information.
These are just a few of the photos of the day for February 12, 2015.

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