Capitalizing on such factors and backed by a healthy balance sheet, Digital Realty is expanding its portfolio on accretive acquisition and development efforts, growing its presence significantly outside America. Recently, Digital Realty's unit, Interxion, started construction of a third data center, BRU3, in Belgium's capital, Brussels. Also, the company's 50/50 joint venture with Mitsubishi Corporation, MC Digital Realty, teamed up with ARTERIA Networks for connected data communities in Japan.