61.  The introduction of nuclear weapons into the world, and their first use at Hiroshima and Nagasaki, left powerful legacies.

62.  The guidelines advise doctors and health workers when to start giving the antiretroviral treatment, the best combinations to use and alternatives if the first use of drugs fails.

63.  The first real use of e-mail, I watched my wife communicate with our kids in Hong Kong and in New York, about six or seven years ago.

64.  The first use of the pass must be made within nine months of purchase.

65.  The infield, which had been covered by a tarp, appeared to hold up well under the first extended use.

66.  The music service is just the first use of the Firefly technology developed at the Massachusetts Institute of Technology.

67.  The pass is good for nine days from the first use.

68.  The principal nuclear powers must also prepare a coordinated response to penalize first use and prevent repetition by destroying the nuclear capabilities of violators.

69.  The project is gaining support at the Pentagon as the first operational use of the Osprey draws near.

70.  The project would be the first major commercial use of a technology that could unlock the value of natural gas equivalent to hundreds of billions of barrels of oil.