Hundreds of bases are contaminated with PFAS, which are linked to low birth weight and other risks. Politicians from both parties are demanding explanations.

© Nina Riggio for The New York Times

Hundreds of bases are contaminated with PFAS, which are linked to low birth weight and other risks. Politicians from both parties are demanding explanations.

The first U.S. attempt at reopening a shuttered reactor has been held back by run-down equipment and a lack of planning.