My wife and I have reservations at an all-inclusive resort in Cancun in late March and have never been to Mexico other than a day trip to Tijuana several years ago. I wasn't concerned about our safety until I mentioned our trip to various friends. Several have mentioned the safety issue, including a rumor of two people shot a while back in Cancun. Do I need to be concerned? Should we cancel our trip? What about sightseeing, shopping, eating outside the resort?