It makes sense for Congress to want to know when classified information has been leaked or declassified in order to distinguish official leaks from unauthorized ones.
"Unfortunately, the overwhelming majority of Americans can't distinguish official federal Washington from Washington, D.C.," Fauntroy said.
Even at great distances, the signals created by a collision or an explosion are easy to distinguish, the officials said.
White House officials distinguished between genetic information, which may indicate a predisposition to an illness or disease, and the actual medical condition or disorder.
But despite the executive order's emphasis on steps to "ensure military objectives and civilians are clearly distinguished", senior administration officials indicated that Obama will permit signature strikes to continue.
But distinguishing an official trip from a campaign appearance is increasingly difficult these days, especially in a state like Ohio, which Mr. Bush narrowly won in 2000.
Yet even some who receive the mayor's private money said it can be hard at times to distinguish his official actions from his private charitable giving.
"We remind American citizens to remain vigilant with regard to their personal security and to exercise caution," the statement advised, adding that "terrorist groups do not distinguish between official and civilian targets".
The icon for a verified account is designed to make it easier for users to distinguish between official pages and impersonators.
Marsh is keen to distinguish between official types of harassment (landlords making threats or illegally entering apartments, for example) and building and safety code violations (like allowing a building to deteriorate).
"We think [satanic clubs are] especially important when religious clubs target young children ages 5 to 12," said Starr, "because at these ages it can be hard for children to distinguish between official educators and the teachers proselytizing to them in the after-school clubs".
