Police officers have been bussed from forces across the country to areas of greatest need.
The crowds were bussed over for an early afternoon of free food at the Bryant Park Grill.
About 150 protesters were bussed into the city centre for the weekly demonstration.
Many of those taking part were schoolchildren who had been given the day off and bussed in for the occasion.
GARCIA-NAVARRO: Calderon supporters, carrying banners and balloons, were bussed in from all over the country to attend the Azteca Stadium event.
Some passengers criticised the airlines for not giving out enough information before they were eventually bussed to hotels for an overnight stay.
An airport spokesman said seven flights were diverted to Birmingham and hundreds of passengers were bussed from Birmingham back to East Midlands.
Amid tight security, about 200 relatives were bussed to the court in the heart of the capital Abu Dhabi for the morning hearing.
Every 15 days they are rotated in and out, bussed over 500km north to the oil fields to spend two weeks drilling in freezing temperatures.
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But in far-flung villages with a majority Roma population, Roma and non-Roma parents alike are upset when local schools close and children are bussed off each day to towns.
It would have resulted in pupils from the village, which has a population of 250, having to be bussed more than five miles down the A84 to the next nearest school, Strathyre Primary, near Callander.
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Several relatives waiting to be bussed to the hearing in Abu Dhabi said the charges against their relatives were baseless and said they hoped justice would eventually prevail either through the courts or by way of the country's rulers.
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