How secure is secure?

Next time someone says "We must secure the border", ask 'em what they mean.  You can't just say "Secure means  nobody gets thru."  That won't happen, there are always leaks.  Let talk real world. 
In the real world we can put up a standard, commercial chain link fence,  8-10 feet high, three strands of barbed wire on top.  For extra  security we can set it on concrete to make it harder to dig underneath. 
For such a fence to do much good, you have to patrol it, and pursue those who climb it or break it.  It will keep out horses, mules, motorcycles, and passenger cars.  With a truck, you can push it over, and the young and athletic can climb it. 
Next step up is a wall like the Berlin wall, or what the Israelis have put up to keep Arab terrorists out.  That will stop nearly anything.  Looks really ugly, but effective.
Then to be serious about it, you have to inspect all motor vehicles and rail cars as they cross the border.  Make drivers open their trunks, look inside trucks.  That will slow border traffic, a lot. 
   Ask 'em which option they want, and will pay for.