it really didnt seem right for a person with charlies skill with a k-bar ( a us marines fighting knife ) to choose to be a medic , but he was to make a fine one , even using his razor sharp knife on more than one occasion to help save lives , then they both joined a troop that had been involved in the embassy siege , so as the new boys on the block they had a lot to live up too , and they did , both quickly becoming indispensable members of their team .