Keywords: Pakistan Air Force B-57s.jpg Pakistan Air Force B-57s This is the No 31 Wing which received the new bombers in 1957 Taken over 50 years ago thus the image is now in the public domain in Pakistan Source http //www pakdef info/pakmilitary/airforce/gallery/images/b57_03 jpg PD-Pakistan original upload log page en wikipedia B-57s jpg 2007-08-20 09 28 Zaindy87 839×668× 59893 bytes <nowiki>Pakistan Air Force B-57s Taken over 50 years ago thus the image is now in the public domain in Pakistan PD-Pakistan </nowiki> 1957 Aircraft of the air force of Pakistan Martin B-57 Canberra |