. >> captain stacey holland and his team are trying to stop drug smugglers from crossing into the u.s. from mexico. >> one guy got out -- >> they are also trying to stop the violence of a full-scale drug war from spilling north. are there parts of this border that you would deem basically lawless or run by the cartels? >> absolutely. smack in the middle of this 21st century version of the wild west, two young american, david hartley, and tiffany young, just teenagers when they fell in love. >> we started dating in '98, the summer of '98 and dated for quite a while before we got engaged in 2001 and married in 2002. >> what took so long? >> we were 18. >> they wound up here in the mexican border town of reynoso, just south of mcallen, he was a district manager for an oil company. >> it was a blessing to our marriage, that is where we truly grew as a couple and had adventures. >> when the hartleys first arrived here, this peaceful town was a perfect place for the young couple to live, but slowly it became more and more violent. there is a war in r oeynoso, tw drug cartels battling for to

. >> captain stacey holland and his team are trying to stop drug smugglers from crossing into the u.sone guy got out -- >> they are also trying to stop the violence of a full-scale drug war from spilling north. are there parts of this border that you would deem basically lawless or run by the cartels? >> absolutely. smack in the middle of this 21st century version of the wild west, two young american, david hartley, and tiffany young, just teenagers when they fell in love. >> we started dating in '98, the summer of '98 and dated for quite a while before we got engaged in 2001 and married in 2002. >> what took so long? >> we were 18. >> they wound up here in the mexican border town of reynosa, just south of mcallen, he was a district manager for an oil company. >> it was a blessing to our marriage, that is where we truly grew as a couple and had adventures. >> when the hartleys first arrived here, this peaceful town was a perfect place for the young couple to live, but slowly it became more and more violent. there is a war in reynosa, two drug cartels battling for tough, the zetas, a f