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Story summary
- U.S. President Donald Trump is overseeing a $900 million White House ballroom slated for completion by Jan 20 2029.
- The ballroom uses nuclear concrete and steel, which Trump says makes demolition impossible.
- The Supreme Court allowed the ballroom construction to proceed despite legal challenges questioning its legality.
- Interior Secretary Doug Burgum announced excavation for a 250-foot triumphal arch will begin within two weeks of Sept 3 2026.
- The National Park Service will run 20-hour-a-day construction with about 250 workers.
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