A Bolivian riot policeman (back) stamps out a burning tyre as a striking employee (front L) of Bolivia's biggest airline, Lloyd Aereo Boliviano (LAB), tries to stop him as he and fellow workers block the entrance to the airport in El Alto, on the outskirts of La Paz, March 30, 2006. Workers from Bolivia's flag airline blocked entrances and runways at the country's main airports, calling for the government to save the debt-crippled carrier. REUTERS/Jose Luis Quintana