power. It represents the aspirations of people who are seeking a better life. Political Unrest AZUZ: Looking around that region, starting next door to Libya in Algeria. The country has lifted a 19-year-old state of emergency, and what that means is that people there have greater freedom of speech and assembly now. Moving south to Cameroon, where protesters are demanding that the country's president step down. He's been in power for nearly 30 years and is running for re-election this year. Finally, Yemen, where eight lawmakers resigned to protest violence against people who are demonstrating against the government. One of the lawmakers said, I resigned because there's been no respect by the government for human rights. Is This Legit ? JOHN LISK, CNN STUDENT NEWS: Is this legit ? The space shuttle Discovery is named after sailing ships. This one's true ! The shuttle is named after two ships that explored the world. Final Mission AZUZ: The space shuttle Discovery has made more trips into space than any other craft. All together, the shuttle's spent almost a full year in orbit around the Earth. Yesterday, Discovery set out on its 39th and last mission, delivering equipment to the international space station. This was Discovery's first launch, back in 1984. And these launches are n't cheap. NASA estimates that every time a shuttle takes off, it costs nearly half a billion dollars.