The present invention relates to an EUV pod having marks, which comprises a mask pod and one or more mark disposed on the mask pod. The turbine fuel controller includes a fuel integrity control logic configured to control a volume of the first fuel in a first fuel line to maintain a first fuel integrity while the turbine engine is operating on the second fuel rather than the first fuel. A second pitching blade is disposed adjacent to the first pitching blade, and the two pitching blades are separated by a distance that is small enough so that the splits initiated by each blade join into a single plane, thereby pitching and splitting the masonry block without the need for a splitting blade. The cam assembly is operatively connected to a linkage arm which in turn is connected to the derail whereby the manipulation of the derail from its non-operative position to its operative, derailing position causes the blue flag signal to be pivoted from the horizontal to the vertical position and which locks out any change in the derail position by manipulation of the blue flag signal. In each iteration each skill group is unscheduled, agent requirements are updated, and agents are rescheduled once. The biological tissue may be so treated at any time prior to implantation thereof in a mammalian body.