Say 4 xplosive loaded heavy trucks detonated simultaneously at the bases of  the 4 pillars? Its such an obvious and inviting target. Sure will give the ISIS boys pride to match binladen's 9/11. I'm sure lots of ISIS boys are christmas stuffing their posterior with C4 xplosive preparing for this grand ascension into Jannah(paradise) with their 72 each  eagerly waiting virgins singing "Willkommen, bienvenue, welcome...."