MNN Galleries

G20 Leaders: A who's who gallery

By: Samantha Johnson on Oct. 16, 2009, 11:23 p.m.
U.S. President Barack Obama

Photo: ZUMA Press

20 of 22

United States of America

U.S. President Barack Obama has made fighting climate change one of his three main political goals since taking office in January, but has faced rigid opposition in Congress, especially from lawmakers whose states are reliant on cheap coal for electricity. As the host of this week's G20 summit, Obama chose Pittsburgh to highlight that city's comeback from economic ruin two decades ago as a model for ending the current recession.