Discuss as:   US officials say an attempted rocket launch in
North Korea ended in failure when the rocket broke up shortly
after launch. NBC's Bob Windrem reports.  Updated at 10:50 a.m.
ET: The United States has canceled a proposed food aid deal with
North Korea following over its attempt to launch a long-range
rocket taking a satellite into orbit.   "We are not going
forward with an agreement to provide them with any assistance,"
White House National Security Council spokesman Ben Rhodes told
reporters traveling with President Barack Obama to Florida.    A
U.S. official told NBC News that the launch was the fourth time
the North Koreans had tried to launch this kind of missile,
saying it should serve as a "real wake-up call" for the
country's new regime.  In a statement, foreign ministers of the
G-8 -- made up of the United States, Canada, Japan, Russia, the
U.K., Germany, France and Italy -- raised the possibility of
action by the United Nations.  "We, the G-8 Foreign Ministers,
condemn the launch by the D