Sunk just off Key West , an island in the Straits of Florida, in 2009, the Vandenberg is the second-largest artificial reef in the world, attracting a diverse range of marine animals and plant life.

CNN: March 7, 2013 -- Updated 1201 GMT (2001 HKT)

Despite advances in understanding the impacts of elevated CO2 concentrations on a wide range of marine organisms, we are still unable to make meaningful projections of impacts on marine ecosystems and fisheries as a whole, or to identify thresholds beyond which marine ecosystems may not recover.

UNESCO: Social and Human Sciences

With a focus on key topical issues such as marine pollution, exploitation and hazards, chapters range from the history of ocean management to current advances in marine science, observation and management applications, and the international agencies active in co-ordinating this work.

UNESCO: Troubled Waters

Kyle, 38, was shot to death Saturday, by a former Marine, police say, while shooting for fun on a Texas gun range.

CNN: STORY HIGHLIGHTS

The ITV is also an important component of the Expeditionary Fire Support System, which allows a mobile mortar system to provide long-range indirect fire support to infantry forces as part of the Marine Corps' "Ship to Objective Maneuver" doctrine.

CENTERFORSECURITYPOLICY: The misguided howl'er over the Growler

Last week's order to ground the planes - in the US air force, army and Marine Corps - marked the second time in two months planes from the F-35 range have been grounded.

BBC: Grounded US F-35 fighter jet fleet to resume flights

In addition, a wide range of laws protecting wildlife and plants, including the Endangered Species Act and the Marine Mammal Protection Act, also were significant accomplishments.

FORBES: Why Can't The Government Address Climate Change? (Q&A With David M. Uhlmann -- Part I)

And the European Marine Energy Centre (EMEC), established in Orkney in 2003, is hosting trials of a range of weird and wonderful inventions so that companies can investigate which of them can cope.

BBC: Tidal power gets a stormy birth off coast of Scotland