Chinese hackers breach US officials' emails, compromising lawmaker and State Department

Chinese hackers breached the emails of U.S. officials including a congressman, Commerce Secretary, and U.S. Ambassador to China.
The hackers exploited a vulnerability in Microsoft software to access accounts for around a month.
Officials say the breaches appear politically motivated, aimed at gathering information on U.S. policy.
The FBI has notified victims, but there are concerns over the delay in warning those affected.
The hacks have raised questions over the security of government email systems and reliance on Microsoft services.