<P> An FPCON level may also be designated as "+", meaning the facility shall institute extra security measures beyond those specified for the FPCON Level . Generally this is used to provide an extra layer of security for FPCON Alpha . There is a list of extra security measures that may be initiated for a "+" security level; normally the facility Force Protection NCO, will choose two or three for his installation, and switch them out randomly to prevent predictable response . Some, however, are nearly always used . For instance 100% ID checks of all incoming persons is nearly always used at FPCON Alpha+, while armed fenceline patrols may be done for two days, then stopped and replaced with anti-surveillance measures to increase randomness and decrease predictability of defense . </P> <P> FPCON levels can also be raised in a non-progressive manner; for example, the FPCON level can jump from FPCON NORMAL to FPCON CHARLIE, completely skipping the ALPHA and BRAVO levels . </P> <P> In the 2009 science fiction movie Transformers: Revenge of the Fallen, the US military assumes Condition Delta when they believe that the arrival of multiple Decepticons to Earth is a string of massive terrorist attacks around the world . </P> <P> In the 2011 science fiction movie Battle: Los Angeles, the US Marines use the term THREATCON Delta when they discover that the "meteors" are actually alien ships . </P>

Force protection condition delta means that your base is at which one of the following (