Facebook Founder Mark Zuckerberg named top US philanthropist

Facebook founder and his wife Priscilla Chan  named joint top US philanthropists for 2013 for donation of 18 million Facebook shares and total $970m (£590m) the largest in the US in 2013 to a Silicon Valley foundation, american biggest Charity.

Philanthropists of previous years was Microsoft co-founder Bill Gates and his wife Melinda, $3.3bn they made in 2004.