Populations of frogs, salamanders and other amphibians are declining at an average rate of 3.7 percent each year, according to a U.S. Geological Survey study released this week. Researchers say the study is the first to calculate how quickly amphibians are disappearing in the United States.
"If the rate observed is representative and remains unchanged, these species would disappear from half of the habitats they currently occupy in about 20 years," according to the USGS.
Saying that "those who commit sexual assaults are not only committing a crime, they threaten the trust and discipline that make our military strong," President Obama on Friday urged Naval Academy graduates to help bring an end to a disturbing series of such offenses.
"They've got no place in the greatest military on earth," Obama said during the commencement address he delivered at the academy's Annapolis, Md., campus.
President Obama is once again calling for the prison at Guantanamo Bay to be shut down, even though new polls suggest most Americans want it to stay open. But the chorus of critics has gained one surprising member: former Guantanamo Chief Prosecutor Morris Davis. Host Michel Martin talks with Davis about why he now feels the facility should be closed.