Israel's Gaza challenge: stopping metal tubes turning into rockets
Current & former officials see no easy answers, saying it is all but impossible to seal off even a relatively small area such as Gaza.
Palestinian members of al-Qassam Brigades, the armed wing of the Hamas movement, display home-made rockets during an anti-Israel military parade, in Rafah in the southern Gaza Strip August 21, 2016(photo credit: REUTERS/IBRAHEEM ABU MUSTAFA)Updated: 
