Some experts say bin Laden's death strikes a serious blow against terrorist networks, meanwhile families of 9/11 victims feel a mixed sense of relief.
Unpredictable ice and bad weather could make it nearly impossible to respond to a spill on the scale of what was seen in the Gulf a year ago.
An official plane carrying First Lady Michelle Obama had to abort a landing at an air force base near Washington on Monday due to an air traffic controller's error.
Life around the Gulf for humans has largely returned to normal a year after the BP oil spill. For wildlife, however, it may be a different story.
Antimicrobial double weave silk material can help block blast particles.
Language slipped into the budget bill has removed an animal from the endangered species list for the first time.
The Department of Homeland Security taps the power of social media.
Jamie Hyneman contracted to develop ultra-lightweight armor for military vehicles.
Many items, including artifacts from the famous King Tutankhamun collection, were targeted by thieves.
In these uncertain times, BBC astronomer Mark Thompson shares his opinion about the funding of space exploration in light of global tragedy.