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Good morning.

Here’s what you need to know:

Arrest in collapse of spy network

• It was one of the U.S. intelligence service’s worst failures in years: China dismantled American spying operations and killed or imprisoned more than a dozen C.I.A. informants since 2010.

Now, an American is suspected of having helped Beijing by identifying informants. Jerry Chun Shing Lee, who left the C.I.A. in 2007, was apprehended at Kennedy Airport this week. Read the affidavit supporting charges against him.

• Officials are concerned that the case could represent a pattern of Chinese intelligence targeting former agency employees.