Russian billionaire Mikhail Prokhorov (center), who was a candidate in Sunday's presidential election, heads to a protest rally in downtown Moscow on Monday, March 5, 2012. (AP Photo/Alexander Zemlianichenko)

Photo by: Alexander Zemlianichenko

Russian billionaire Mikhail Prokhorov (center), who was a candidate in Sunday's presidential election, heads to a protest rally in downtown Moscow on Monday, March 5, 2012. (AP Photo/Alexander Zemlianichenko)