] Beginning in mid-May, pilots who intrude into restricted
] airspace over the nation's capital will be warned by
] pulsating red and green laser beams, part of a government
] effort to prevent a terrorist attack.

] The lasers are harmless, say authorities, who are quick
] to distinguish them from the high-intensity laser
] pointers that have vexed some pilots in recent
] months.

] "This is good laser, if you will," said U.S. Air
] Force Col. Ed Daniel of the North American Aerospace
] Defense Command. "It is very eye safe."

CNN.com - Lasers to warn pilots in restricted D.C. airspace - Apr 15, 2005