Two American military officers were shot and killed today in the heavily guarded Interior Ministry building in Kabul. Weekends on All Things Considered host Guy Raz speaks to Kabul bureau chief Quil Lawrence about the shootings, which follow five days of riots and protests over the burning of Koran's at a NATO base earlier this week.

Earlier today, a court ended a corruption trial against Silvio Berlusconi. But that's not the end of the road for the former prime minister, he still faces charges that he paid an underage teenager for sex. Friends of Berlusconi say that he is lonely and increasingly isolated. Weekends on All Things Considered host Guy Raz talks to writer Philip Delves Broughton who got unprecedented access to Silvio Berlusconi in Rome and wrote about the interview for The Atlantic.

Gas prices are on the rise and there's a slew of possible reasons as to why. Tensions with Iran, the Obama administration's policies, and Wall Street speculators have all been cited as factors. But it still doesn't answer why prices are increasing while U.S. demand for gasoline is going down. Weekends on All Things Considered host Guy Raz talks with NPR's John Ydstie about some hidden factors behind the jacked up gas prices.

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SCOTT SIMON, HOST:

As the assault against Homs continues, Secretary of State Clinton is urging Syrian security forces to disobey orders from their own commanders and stop the violence against protesters. Aram Nerguizian researches Middle East military strategy at the Center for Strategic and International Studies. We asked him about the possibility of further defections among the ranks.

Fresh Air Weekend highlights some of the best interviews and reviews from past weeks, and new program elements specially paced for weekends. Our weekend show emphasizes interviews with writers, filmmakers, actors, and musicians, and often includes excerpts from live in-studio concerts. This week:

Events as disparate as the cruel, escalating violence in Syria and the congested, unnerving conditions where Apple's iPads and iPhones are made at the Foxconn assembly plants in China raise a recurring question:

When do a country's internal affairs become the business of the world? And when do we make that our personal business?

You can take that question back through atrocities, crimes and outrages of recent history.

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Time now for your letters.

(SOUNDBITE OF TYPING AND MUSIC)

SIMON: Today a correction, so maybe some music that's a little more suitable.

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SCOTT SIMON, HOST:

There's a limited humanitarian effort already underway in Syria. The Red Cross is in the process of evacuating injured people from the embattled Homs neighborhood of Baba Amr. At least 27 people are reportedly receiving medical treatment after being driven out in ambulances yesterday. The evacuation comes after a week in which Baba Amr was pounded by some of the heaviest artillery attacks by the Syrian government.

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The northeastern Greek town of Soufli flourished in the 19th century because of its vibrant silk trade. Silk farming declined in the 20th century with the invention of synthetic silk, but a few families have hung on. Despite the economic crisis, one of those families opened a silk museum in the hopes of drawing tourists and life back to a forgotten Greek town.

Joanna Kakissis sent us this postcard.

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SCOTT SIMON, HOST: