President Barack Obama, addressing the American people directly for the first time since military operations began in Libya, offered no new details about how the U.S. commitment there will end, but pledged that Libya won’t be another Iraq. “Regime change there took eight years, thousands of American and Iraqi lives and nearly a trillion dollars. That is not something we can afford to repeat in Libya,” Obama said. Seeking to sway a country divided and confused by the unexpected air and naval mission against Libyan leader Muammar Qadhafi, Obama laid out a sweeping rationale for the action, arguing that it...