Titanic,
You really must get a grip here. You are posting photos in willy nilly manner, not distinguishing claims associated with the North Tower from those associated with the South Tower. This is a South Tower thread.
You have already been told by posters that there was another thread, the so-called Dick Oliver thread, that dealt with the plane debris issue as it related to the North Tower.
Your posted photos do not differentiate the one from the other.
Your use of photos published in NIST's NCSTAR1 series is incomplete and misleading.
Please see post nos. 920 and 922 from the first Dick Oliver thread for a proper discussion of the perimeter beam with wheely:
http://www.internationalskeptics.com/forums/showpost.php?p=5797153&postcount=920
http://www.internationalskeptics.com/forums/showpost.php?p=5797251&postcount=922
The other photos you have posted have all been shown to be utterly and completely inconclusive. They are not evidence of anything and have not been either identified or traced to any aircraft, let alone those the common storyline mandates to have been involved in 9/11.
.