British police officers stand facing a residential property in Amesbury, England, Wednesday, July 4, 2018. British police have declared a “major incident” after two people were exposed to an unknown substance in the town, and are cordoning off places the people are known to have visited before falling ill. (AP Photo/Matt Dunham)
A British police officer guards a cordon outside the Queen Elizabeth Gardens park in Salisbury, England, Wednesday, July 4, 2018. British counterterrorism police are investigating Wednesday after two people were left in critical condition, exposed to an unknown substance. (AP Photo/Matt Dunham)
AMESBURY, England — Four months after a quiet corner of England was plunged into a Cold War-style saga of spies, chemical weapons and international tensions, residents wondered Wednesday whether it was happening all over again.