A physically disabled woman on her wheelchair clashes with riot police in the centre of La Paz, February 23, 2012. Hundreds of physically disabled people arrived in La Paz on Thursday after completing a protest march of some 1600 km (994 miles) over a hundred days to demand that Bolivia’s government offer support in the form of 3000 bolivianos ($434) payment to each physically disabled Bolivian, according to local media. REUTERS/David Mercado (BOLIVIA – Tags: CIVIL UNREST HEALTH BUSINESS POLITICS)