Among the key things to know about what's in the hundreds of pages of evidence and other materials related to the Feb. 26 shooting death of Florida teenager Trayvon Martin, which were released Thursday:

Smoke from wildfires in New Mexico and Arizona is expected to be noticeable across both states until at least this afternoon. The National Weather Service says windy and dry climate conditions will shift smoke from large wildfires burning in northern and central Arizona and southwest New Mexico. The winds will likely push smoke into central and northern New Mexico today and southward on Saturday.

A watchdog group says New Mexico lacks enough inspectors to adequately oversee the tens of thousands of oil and natural gas wells across the state. 

Earthworks' Oil and Gas Accountability Project released a new report Thursday that shows the number of inspections conducted by the Oil Conservation Division increased in 2011 but that more than half of producing wells went unchecked. The group questions whether the state can ensure responsible oil and gas development without adequate inspections and enforcement of existing rules.

On Sunday, Albuquerque residents and visitors will be treated to the rare sight of an annular solar eclipse.  The eclipse starts at 6:28 PM and continues until the sun sets.   KUNM’s Conservation Beat reporter Sidsel Overgaard spoke with Barry Spletzer with the Albuquerque Astronomical Society to learn more.

Facebook's much-publicized first sale of stock to the public started with a bang late this morning as the price per share jumped. But though the volume of shares sold was a record for an initial public offering, the stock's price gave up its gains as the day continued.

By the end of trading in the U.S., Facebook had settled right at the $38 initial offering price that had been set before shares went on sale.

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The president makes the food security announcement as world leaders prepare to meet at Camp David.

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This G8 summit coming this weekend includes leaders from the world's largest economies and they'll be discussing what to do about the very troublesome economy in Greece.

INSKEEP: Greece keeps cutting its budget to help pay debts and avoid default, but then its economy keeps contracting, making the problem worse.

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All right. As protestors make their preparations outside, inside the NATO summit, there's an expectation that leaders will showcase a unified, long-term commitment to Afghanistan after the 2014 troop drawdown. The United States already signed a strategic security pact with Afghanistan, pledging support for that country until 2024. The Obama administration hopes to convince other countries at the summit to do the same, but as NPR's Jackie Northam reports, it could be a hard sell.