With June 6, 2006, rapidly approaching, authorities in Colorado and elsewhere are carefully watching to see if that date - 6/6/06 - spurs demonstrations or violent activity. They are aware that 666 signifies the Mark of the Beast or the Antichrist to some organizations and believe June 6 is a date that could trigger problems. "It's been a conscious question among some of our folks, so they've been on the lookout for something," said Lance Clem, spokesman for the Colorado Department of Public Safety. "But they haven't seen anything." Even so, some local police are being vigilant. "The bottom line...