I haven't seen any such evidence.
I'm not going to waste time arguing with you. Last figures I saw showed that we had an average of one guard for each five miles of the Canadian border and seven guards for each mile of the Mexican border. Still, only an estimated one third of the southern border jumpers get caught. Doubling or quadrupling the guard isn't going to stop the border jumpers.
Instead of being idiots and trying to do something impossible such as seal the border, it is smarter and more effective to concentrate our resources on the transit points leading to the border, starting in the middle east and Asia. No knowledgeable person believes that a fence would do any good at all on the vast desolate mountains and deserts of the border. Even the short Tijuana border gets breached daily by numerous laborers and it has fences, patrol roads, motion sensors, flood lights, planes, helicopters, atvs, uavs, and horseback patrols.
And if we could magically seal the Mexican border, laborers would just come by the gulf coast. Can we seal the coast?
The Canadian / US Border stretches over 5,000 miles.
We do not have 1,000 agents stationed up there, but its pretty close.
What some people on here fail to inform people about is the actual number of folks on duty during an 8-hour shift. Those 1,000 Agents dont work 24 and 7. In reality, it takes at least 5 Agents to cover one 8-hour shift.
So, only 1/5th of your force is on duty at any given time. Of that 1/5th, approximately 1/3rd are doing something other then patrolling the border. See, not all border patrol agents patrol the border. The agent in the field needs support, and an agents shift may be in a supporting roll on any given day.
So lets look at what is really guarding the border. 1/5th of one thousand is 200. Lets be generous and say 25 are in support rolls, that leaves approximately 175 Agents to guard the US / Canadian border during any given 8 hour shift. 5,000 divided by 175 equals 28.5.
So, in reality there is 1 Agent every 28.5 miles on the US/ Canadian border. How effective is that?
Now, lets look at the US / Mexican border. We have approximately 10,000 Agents down there. Well be generous and say there are 11,000 Agents stationed down there.
Using the same formula, that leaves us with 2,200 for each 8-hour shift. Well be generous again and say 200 of those are in supporting roles. Now we are down to 2,000 Agents along the 2,000-mile border.
So, in reality, there is approximately 1 Agent per mile along the US / Mexican border.
Thats far less then 7 Agents that some people claim to be guarding every mile.