Leaked Pentagon documents takeaways: Here are details on what they reveal

CBS News has reviewed over 50 documents that appear to be part of the leak of highly sensitive information. The documents' presence online prompted a criminal investigation that led to the arrest on Thursday of a 21-year-old Air National guardsman. 

It's not known how many documents Teixeira is alleged to have leaked. The criminal complaint against him refers to "dozens," and the Washington Post recently stated that it had reviewed about 300. CBS News has not authenticated the documents, though the Pentagon has acknowledged at least some of the leaked documents are real.