AT&T cybersecurity breach potentially posed 'risk to national security'

The Department of Justice delayed releasing information about a data breach involving AT&T, citing national security risks. AT&T's SEC filing revealed the breach affected 110 million customers, accessing phone and text records but not message content. Senator Ron Wyden criticized the lack of cybersecurity and called for FCC accountability. Experts warn of national security threats due to the breach's scale, though authorities have not disclosed who accessed the data.

What did Senator Ron Wyden say about the frequency of data breaches among major phone companies?

What potential national security threat does the data breach pose according to cybersecurity experts?