Credit U.S. Forest Service / Oregon State University Libraries
Controlling dust from activities like this was on the minds of those in the Department of Labor in the 1930s, as silicosis, a lung disease, was taking a toll on American workers. Above, a worker jackhammers into rock in Lassen National Forest in California in 1934, preparing to shoot explosives.
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A worker sprays water onto a large circular saw as the machine cuts sandstone in Sydney, Australia, in 2005. Applying water can help reduce the amount of dust that makes it into the air.
Any job that involves breaking up rock or concrete or brick can potentially expose workers to dangerous silica dust, and last year it looked like the Department of Labor's Occupational Safety and Health Administration was about to put stricter controls in place to limit this health hazard.
Drug errors inside hospitals remain a big problem.
By one estimate, 1 in 7 hospitalized patients suffers some form of error in care. Nearly a third of those mistakes are related to drugs. And those mix-ups can lead to longer hospital stays, unnecessary suffering, permanent damage or death.
One way to reduce mistakes is to have doctors enter the prescriptions on a computer instead of with pen and paper. After the switch, hospitals can see error rates drop by a whopping 60 percent.
Israeli soldiers take part in an exercise at the Shizafon army base, in the Negev Desert north of the southern city of Eilat, on Tuesday. There are growing signs that Israel may be planning a strike against Iran's nuclear facilities.
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Israeli army snipers pack their gear after an army exercise at the Shizafon army base, in the Negev Desert north of the southern city of Eilat, on Tuesday.
In Israel, there is daily speculation over whether Israel will attack Iran's nuclear facilities in the near future. The debate is not only over whether Israel should strike Iran, but what the costs and benefits might be from such a strike.
Israel believes that Iran is working to build a nuclear bomb, and dismisses Iran's assertion that its nuclear program is solely for civilian purposes.
Saying "we all have a choice — stand with the people of Syria and the region or become complicit in the continuing violence there," Secretary of State Hillary Rodham Clinton just urged the U.N. Security Council to support an Arab League call for "a negotiated, peaceful political solution to this crisis and a responsible, democratic transition in Syria" that would lead to the end of President Bashar Assad's regime.
After a decisive South Carolina win, former House Speaker Newt Gingrich has risen and fallen in the polls and trails former Massachusetts Gov. Mitt Romney by double digits going into Florida's primary.