Slovakia’s downhill mountain bike champion Filip Polc is seen on the edge of a cliff as he trains on the outskirts of La Paz, Friday, April 9, 2010. Polc is training in Bolivia’s altitude ahead of competing in international mountain biking competitions. (AP Photo/Juan Karita)

Slovakia’s downhill mountain bike champion Filip Polc is seen on the edge of a cliff as he trains on the outskirts of La Paz, Friday, April 9, 2010. Polc is training in Bolivia’s altitude ahead of competing in international mountain biking competitions. (AP Photo/Juan Karita)

A demonstrator holds a sign that reads in Spanish “Stop the violence against women” at a protests against the visit of Iran’s President Mahmoud Ahmadinejad in La Paz, Tuesday, Nov. 24, 2009. Ahmadinejad is on a one-day visit to Bolivia. (AP Photo/Juan Karita)

A demonstrator holds a sign that reads in Spanish “Stop the violence against women” at a protests against the visit of Iran’s President Mahmoud Ahmadinejad in La Paz, Tuesday, Nov. 24, 2009. Ahmadinejad is on a one-day visit to Bolivia. (AP Photo/Juan Karita)

In this photo taken Saturday, Oct. 31, 2009, professional wrestlers wearing masks of Bolivia’s President Evo Morales, left, and opposition presidential candidate Manfred Reyes Villa pose for a photo after a show in La Paz. Wrestling managers are profiting of next December’s presidential elections by setting up burlesque fights in which the wrestlers wear masks mocking the presidential candidates. (AP Photo/Juan Karita)

In this photo taken Saturday, Oct. 31, 2009, professional wrestlers wearing masks of Bolivia’s President Evo Morales, left, and opposition presidential candidate Manfred Reyes Villa pose for a photo after a show in La Paz. Wrestling managers are profiting of next December’s presidential elections by setting up burlesque fights in which the wrestlers wear masks mocking the presidential candidates. (AP Photo/Juan Karita)

A caterpillar works at the Rio Grande lithium pilot plant prior to a visit of Bolivia’s President Evo Morales in the Salar de Uyuni salt desert , in southern Bolivia, Thursday, Oct. 29, 2009. Salar de Uyuni is the world’s largest salt flat at 10,582 km2 (4,085 square miles) and holds around half the world’s reserves of lithium. (AP Photo/Juan Karita)

A caterpillar works at the Rio Grande lithium pilot plant prior to a visit of Bolivia’s President Evo Morales in the Salar de Uyuni salt desert , in southern Bolivia, Thursday, Oct. 29, 2009. Salar de Uyuni is the world’s largest salt flat at 10,582 km2 (4,085 square miles) and holds around half the world’s reserves of lithium. (AP Photo/Juan Karita)