Flight delays continued Thursday as American Airlines moved to cancel another 900 flights and expectations grew that cancellations are likely to spread to other U.S. carriers as regulators tighten their safety audits of airlines.

In an attempt to increase security after 9/11, the U.S. Coast Guard has conducted over two dozen live-fire drills using their new deck-mounted machine guns in the Great Lakes region. A reporter discusses the public's reaction to this new program.