AT&T says an outage is preventing many customers from completing calls between carriers, but 911 calls are going through; Verizon customers also report issues (Samantha Murphy Kelly/CNN)

Samantha Murphy Kelly / CNN:
AT&T says an outage is preventing many customers from completing calls between carriers, but 911 calls are going through; Verizon customers also report issues  —  A nationwide AT&T outage is once again leaving some customers in the dark on Tuesday.  —  In a statement sent to CNN …