Crews have finished recovering the wreckage of a plane and helicopter that collided mid-air, killing 67 people.

Officials announced Tuesday that the section of the Potomac River that was impacted by the DCA crash has been fully restored.

Six days ahead of schedule, officials on Tuesday announced the section of the Potomac River affected by the deadly collision ...

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In this paper, we propose a very simple but effective metric for predicting quality of contrast-altered images based on the fact that a high-contrast image is often more similar to its contrast ...