Helplessness: Exactly as you put it, I felt this cause all we could do was sit there, until it was clear for us to enter.
Anger: It was our sister battalion that got hit, so we knew some of them. Although I did not know the Soldiers inside the tank... nonetheless they were our Soldiers. My anger stems from our Soldiers dying like that, and if they were alive-and calling for our help... we were just under 100m away.... also anger towards the people that killed them... and the Iraqi civilians nearby, that didn't warn them... just let them roll over the bomb and die. To me they are just as guilty as the ones who planted the bomb.
Fear: Fearful for my life as well, just being out there.
Frustration: Because I desperately wanted to beat the living shit out of whoever was responsible for doing that to our Soldiers... as well and kill the civilians who were nearby. <-- I know that sounds bad, but at the time, that is what I felt.