With civil rights challenges, the segregation policy that kept African Americans out of public housing changed in the 1960s.
They covered up or simply kept their mouths shut to keep Americans in the dark.
Or does the specter of the past keep Americans from recognizing and responding to an unprecedented danger challenging the country?
Some hoteliers believe fear of terrorism is keeping Americans at home.
Who knew that keeping Americans out of space would be key to Lee's away dominance?
The unusual program is intended to keep black Americans from getting trapped on the wrong side of the cyber gap.
But even so, there were surprising mistakes that kept Americans off the medals podium.
States that had used it adopted other means to keep most African Americans from voting.
At the same time, the administration sought to keep Americans from pushing panic buttons.
He laments "the absence of conventions that keep Americans from punching each other out."