By WALT BOGDANICH and JO CRAVEN McGINTY
Hundreds of hospitals across the country needlessly exposed patients to radiation by scanning their chests twice on the same day, records indicate.
By CHARLIE SAVAGE
President Obama rejected the views of the lawyers when he decided he had the authority to continue U.S. participation in Libya without Congressional authorization.
By SCOTT SHANE
The case of Stephen J. Kim, an arms expert, is next in line in the Obama administration's unprecedented crackdown against leaks to the media.
By DAVID D. KIRKPATRICK
With professional soldiers called away to rebel hot spots, amateurs are an increasingly important part of Col. Muammar el-Qaddafi's defense of the capital.
By ANTHONY SHADID
Deaths and injuries are reported as government forces attack demonstrators in two large cities.
By LIAM STACK
Syrian security forces were coming nearer to makeshift refugee camps lining the border with Turkey.