Egyptian authorities said that attack was linked to Israeli-Palestinian violence and launched a large wave of arrests in Sinai.

NPR: Deadly Blasts Rip Egyptian Resort of Sharm el-Sheik

U.S. military analysts figured out during the early days of the Cold War that no effective defense against a large-scale nuclear attack was likely to be feasible.

FORBES: Nuclear Paradox: Shrinking U.S. Arsenal Requires Huge New Expenditures

Jago said witnesses spotted one or two other large sharks circling at the time of the attack, but that no sharks have been seen in the area since then.

NPR: Loved Ones Salute New Zealand Dad Killed By Shark

After years of controversy, the Food and Drug Administration has asked Abbott Laboratories to yank the weight loss drug Meridia, generically known as sibutramine, from the market as a result of a large clinical trial that found the drug increased the rate of heart attack and stroke in patients at high cardiovascular risk.

FORBES: FDA Yanks Meridia -- And Finds It In A Supplement

Sometimes the danger of such an attack and the ensuing loss of business is enough to drive large websites to pay hackers that issue such a threat.

BBC: Gaining access to a hacker's world

Mr. WITTE: Well, it's an interesting question because FEMA is an agency, obviously, that is under attack right now, very heavily criticized, and it's an agency that is being criticized in large part because the agency has been hollowed out, to a certain extent.

NPR: Post-Katrina Contractors in the Gulf Region