With the women tied up and Sandra neutralized for now David opened his bag.  He took out a syringe and a length of rubber tubing.  He pulled the tubing around his arm, found a vein, inserted the needle and pulled back, filling the syringe with his blood.  He walked to where Mitzi was laying on the floor and bent down toward her.  He grasped her arm with his left hand and started moving the syringe toward it.  He was unaware of the strong physical condition of his victim.  Mitzi pulled her legs to vertical and kicked as hard as she could.  She hit him in the stomach with her foot.  He nearly fell and knocked over a lamp.  David lost his grasp on the syringe.  It fell to the floor and shattered into pieces.  In spite of the precise planning for the operation he had not considered this possibility.  He had no spare.   The noise must have alerted the agents outside.  He heard Sandra’s radio and realized that the agents outside would be coming in soon.  He pulled her weapon, took off the safety and ducked behind the partition.  With no response from Sandra the door sprung open and two agents bounded in.  Dave hit the first one in the chest with four rounds and fired four shots at the other.  The two hollow points embedded themselves in the bullet proof vest but the two Teflon rounds penetrated the vest and the agent fell, mortally wounded.  The term cop killer given to them had just played out again.  The other agent broke to the right and took momentary cover.  Meanwhile he was on the radio, calling for help.  He had no idea how but he knew both perimeter lines had been breached and an armed man was with the president’s family.  He could see Sandra on the floor and knew at this time he was the only effective protection for the family.  He had become the Custer agent without the ammunition that was thought to be needed.  He also had three problems to divide his attention, the room, the man in the room and the open door.  There could be other persons in the room with the man.  Worse, the next person who entered may be an agent or a confederate of the man in the room.  He had to watch the man, the door and the rest of the room.  Any good agent would look at this situation and tell you the outcome could be very bad.  If an agent came through the door he had to recognize and not fire.  If it was an accomplice of the man in the room he had to identify him.  And worse, it could be an innocent person.  This was the situation he feared.  He did not know how many people had broken through or how they had gotten in.