I came to know about Tim Hetherington from his connection with Sebastian Junger and their project in the Korengal Valley - read the book "War" and read about the documentary "Restrepo". Saw and liked the work of Chris Hondros... who made photos that are outstanding with out regard to the conditions.
Almost all of what I know comes via reporting of some kind and one learns to judge the quality of that reporting by the consistancy, transparency, and passion of the individuals and agencies... and hopefully thru a (relatively speaking) agenda free approach.
For the most part I prefer history or at least the distance of history, but there are some "reporters" of current events that you tend to pick up on... not many. I feel that the work of Hetherington and Hondros is in that direction.
My condolences to the family and friends.
Casey