美联社新闻一分钟 AP NEWS 2008-02-21（在线收听）

1. 'Motive is a very important issue for us.'

Illinois authorities are still looking for answers one week after Steven Kazmierczak killed five NIU students before killing himself. On top of their minds, they don't know why he did it. Kazmierczak left no suicide note and took several steps to hide his motive.

2. The navy may have to wait another day before launching a heat-seeking missile to shoot down a spy satellite. The Pentagon says weather may be a key factor as they try to figure out whether to move forward with the mission or put it off.

3. Louisiana police say they'll investigate the cause of the woman seen in this police department video. The woman says she was beat after a November drunk driving arrest. An attorney from the police officer connected to the case said she fell.

4. Eight-year-old Griffin Stevens made the shot of a lifetime this past weekend. Check out this three-pointer from near half court with just seconds left in the first quarter. Now that calls for celebration.