not just about slant, but about access

While many international broadcasters are often criticized in North America as providing politically slanted content, in crises such as Gaza, the SF Gate reported about the differences in access journalists have during conflicts:

"some network reporters locked out of Gaza did use material from other sources.
Footage from a Jan. 6 NBC News story on an overwhelmed Gaza hospital - complete
with images of wounded children - was from a photojournalist inside Gaza the
network hired, anchor Brian Williams told audiences. And a Jan. 9 ABC News report
on children killed during the war used footage credited to Ramattan, a Palestinian
news outlet based in Gaza."

However, although synergy is happening between journalists/photographers/videographers from all different newscasts, North American broadcasts often do not mention where they get the images and do not fully disclose particular information about the scenes:

"But that ABC story noted that 257 children had been killed - it didn't divide the
number by the number of Israelis or Palestinians. Dajani and other analysts say that
sort of vague reporting gives the impression that losses on both sides of the war
were equal."

Two observations of these happenings is that, one, due to diminishing bureau budgets, synergy between journalists seems more and more logical. While this fact seems benign, in light of the fact that there are very few Arab based broadcasters on television, what other information comes from these sources but is turned into something altogether different by their North American counter parts? Does this synergy provide cheaper content to North American broadcasters? What economic factors are determining the rejection of IBs such as Al Jazeera from getting an American cable contract?