Jim, Guardian 17 hours ago.
Since last July Egypt has bolstered Israel's blockade on Gaza by destroying over 1,600 tunnels that smugglers once used to bring crucial goods (and weapons) into the territory. The end of the tunnel trade, which Egypt had tolerated for years, crippled Gaza economically, since the simultaneous closure of Egypt's formal border at Rafah meant Gazans had no other way of importing many supplies.
http://www.theguardian.com/commentisfree/2014/jul/30/egypt-siding-israel-cost-gaza-dear