As the Flint water crisis was being discovered, Michigan environmental officials tried to manipulate exemptions in the state's freedom of information law to keep secret emails that should have been subject to disclosure.

"Marilyn and Jack Whitcher have been regular visitors to the glacier-carved valley of Yosemite National Park since they were dating more than five decades ago. This trip was different."

The efforts of more than 700 mosquito-abatement districts in the U.S. are inconsistent, uncoordinated, and often poorly funded -- and that will make it hard to fight mosquito-borne diseases like Zika virus.

"Gov. Rick Snyder said Monday his office will release thousands of pages of emails his staff sent or received related to Flint’s water supply switch and subsequent contamination dating back to 2011."

Michigan officials still say they cannot conclusively link an outbreak of Legionnaire's disease to Flint’s contaminated water supply, partly because sputum cultures were not collected from patients. But the possibility of a link was raised in internal government emails as early as October 2014, and state officials did not inform the public of the outbreak until last month.

"Residents of Flint, Michigan, began getting gravely ill and in some cases dying in summer 2014 in one of the worst outbreaks of Legionnaires' disease in U.S. history, and a county health director says attempts to find the source were hampered when the state wouldn't request federal assistance."

"More than eight months before Gov. Rick Snyder disclosed a deadly Legionnaires' disease outbreak in the Flint area, federal health officials worried a lack of cooperation in Michigan could be hampering the public health response."