White House Security Fence Before and After
![](http://a.abcnews.com/images/Politics/ap_gty_white_house_security_fence_split_jc_140923_16x9_608.jpg)
(AP|Getty Images)
In the wake of Friday's fence-jumping incident, the White House is stepping up security with one of the most basic defenses in its toolkit: a second, shorter fence in front of the existing one.
The new portable fence is about waist high and appears to be linked together with plastic ties.
![](http://a.abcnews.com/images/Politics/ap_white_house_security_fence_jc_140923_16x9_608.jpg)
(Carolyn Kaster/AP Photo)
The permanent fence, the only physical barrier in place until today, stands about eight-feet tall.
![]( http://a.abcnews.com/images/Politics/gty_white_house_security_fence_jc_140923_16x9_608.jpg)
(Paul J. Richards/AFP/Getty Images)
The new double barricade comes just four days after an Army veteran scaled the fence and managed to enter the executive mansion with a 3 ½ inch knife.
Following the security breach - which has President Obama "obviously concerned," according to press secretary Josh Earnest - the Secret Service vowed to clamp down on security protocols.