Michigan, Virginia, Wisconsin, Pennsylvania and Washington are among the states that have activated their National Guards to strengthen security. But in Sacramento, hundreds of people were determined to celebrate an unconventional MLK Day by joining a vehicle caravan through the capital city. Under the protection of the police escort, people navigating low-riders, bikes, cars and trucks took a winding course through the streets, beeping horns and showing both pride and perseverance in a city that has seen its share of troubles in the last year, including racial unrest. They did not pass near the fenced-lined Capitol, where more than 1,000 National Guard troops are currently stationed at the city’s core. But they traveled with a message of unity and solidarity, with the police beside them, if only for a day.