kingdom. is it imminent? they believe the answer is no. until there is more evidence, you're not going to see the u.s. government go to a higher level. >> roger cressey, thank you very much. a serious warning remains in place for americans traveling much closer to home in mexico. that country's violent drug war is increasingly being felt across the border. authorities in texas believe an american couple may have become the latest victims. mark potter reports. >> reporter: during their eight-year marriage, david and tiffany hartly loved adventure vacations and last week rode jet skis in south texas to photograph a church on the mexican side of the lake. on their way back, they were attacked by gunmen in three boats. only tiffany escaped to call 911. >> yes? >> are you sure that your husband got shot? >> yes. he's hit in his head. yeah. >> was he thrown out of the jet