Here's an enlightening look behind the curtain over at Reuters' Middle-East department.
When he was called from holiday to the Lebanon war he learned that several stringers on the front line in the south did not have Reuters cameras. Two office computers had viruses and were infecting others. No FTP server was available for accessing pictures for editing, so photographers were filing to the private email of the Beirut chief photographer. He didn't have the password so he couldn't access pictures directly. Add to that the fact that no one in the Beirut photo operation could write acceptable captions, and that he found someone unqualified and unauthorised in the office accessing the pictures, and the nature of the task he faced in the middle of a war begins to emerge.
...
Outgunned, beset by equipment problems and technical difficulties, swamped by the flow of pictures—many gory to the extreme—he worked all day and into the nights to select, edit, caption and file. Was it possible to have complete oversight in such conditions? Is it surprising two tampered pictures got through? He accepts responsibility for not spotting them, but could he not have expected backup from the Singapore photo desk? And if he didn't give the right answer at first when the questions began, was he protecting himself or someone else in the bureau?