shootings has taken place in pockets around the nation but is concentrated largely in the north and along the border with Panama, a region with a long history of drug trafficking. Most of the 11 were shot while on patrol.

In response, the military is sending troops to accompany police. Officers are also being encouraged to arrive to work in plainclothes, wear bulletproof vests and travel in pairs.

The killings come at a time of flux in Colombia’s drug war.

Coca production in the country surged 18 percent last year to levels unseen in nearly two decades of U.S. eradication efforts, according to a White House report. Authorities have set a goal of destroying 100,000 hectares of coca crops this year through a combination of manual eradication and voluntary crop substitutionRush University Medical Center in Chicago. Funding was provided by grants from the National Institutes of Health and the Illinois Department of Public Health. The study was published in the peer-reviewed medical journal Stroke .

The BBC provides good coverage of this story.

What kind of research was this?

This was a cross sectional analysis in which researchers looked at brain autopsies to see whether any changes in the brain were related to the movement problems experienced by older people.

The researchers were particularly interested in a group of problems called “parkinsonian signs”, which are commonly seen in older people. These include slowing of movement, problems with posture and walking stride, as well as tremor and rigidity (stiffness). They are called parkinsonian signs because they are similar to the problems seen in