Well let's all be thankful that we are not the individual(s) who prompted tonight's announcement over the base PA: "Attention, attention, Task Force Med (the hospital here) is in short supply of type 'O Negative' blood. Contact them to donate ASAP.".
Anyway, keep that in mind the next time you think things are going bad for you. Don't forget all of the fallen comrade ceremonies that occur here 24/7/365 (nothing like seeing several hundred (thousand?) people lined up and saluting, along a darkened road waiting for a hummvee with a flag draped casket to pass by. The most recent was a coalition (Polish) KIA.