Given the task definition and input, reply with output. Given a text, write a compressed version of it in a single sentence.

For the first time in history, all nonemergency civilian aircraft in the United States were grounded, stranding tens of thousands of passengers across the country. Contingency plans for the continuity of government and the evacuation of leaders had been implemented.
All nonemergency aircraft in the United States were grounded, stranding thousands of passengers across the country. Contingency plans for the government and the evacuation had been implemented.