On Thursday, a nationwide cellular and internet outage affected tens of thousands of Americans. Could it have been caused by a solar flare? Also featured: a private company's attempt to land a spacecraft on the moon, the interest in and challenges of drifting in Afghanistan, a doctor's tips for staying focused, and an Earth-bound program that aims to simulate life on Mars.

This Friday's news quiz covers topics featured throughout the week on The World from A to Z.

1. Alexei Navalny, who reportedly died in prison last Friday, was a popular opposition leader in what country?

2. Name the president of the country discussed in question 1 – a man who’s widely expected to easily win re-election next month.

3. What is the only deer species whose male and female members can both grow antlers – and whose Canadian numbers have decreased by more than 700,000 in recent years?

4. In what nation did the Carnival of Basel take place this week, featuring parades, masked marchers, music, and crowds of onlookers for an event that dates back to the 1300s?

5. Since the latest war in the Middle East began, attacks on ships in the Red Sea have been carried out by what rebel group, which is based in Yemen and supported by Iran?

6. Name one of the two major rivers in Iraq, which has seen its waterways thoroughly polluted and disrupted by a drought and dams in other countries.

7. In what historic U.S. city, which was featured on Thursday’s show, are mentors and peers trying to counsel kids out of crime following a 39-percent increase in violent crime last year?

8. In what European nation, whose capital is Stockholm, are elementary school students routinely taught survival lessons that involve plunging into near-freezing water?

9. A nationwide internet and cellular service outage affected tens of thousands of Americans – mostly customers of what carrier (company)?

10. February 23 marked the anniversary of when a historic photo captured American Marines planting the U.S. flag on the island of Iwo Jima. During what war did this occur?