1.   Administration officials believe North Korea is preparing for a launch of a longer range missile this year.

2.   Both countries tested nuclear weapons last year and delivery missiles this year, adding to fears the conflict could escalate into wider war.

3.   Both nations tested nuclear weapons last year and delivery missiles this year.

4.   Both countries tested nuclear weapons last year and delivery missiles this year.

5.   Experts say China tests missiles every year at this time.

6.   India and Pakistan tested nuclear weapons last year and delivery missiles this year.

7.   That could spur an arms race with Pakistan, which also tested its own long-range missile this year.