I live on the desert and I watched the tapes. While i have never been to western sloped desert (with rock outcroppings) shown on tapes, It is easy to tell from the flowering ground cover what time a year it is withing a week or so. The whilte blooms are similar in Western North America from Mexico to the Yukon all of which I have seen at the time that tape could have been shot. The rainfall caused a "green up" in the tape and it only happens in the Spring. In the Fall there is no energy in the root structure of those perenials. Never in this time of year. Any one who has been to pakistan or Afganistan who has any biology background can nail it down in a New York minute. Who needs to get informed so they can date the tapes using the biology showing?