Tens of thousands of people have taken to the streets in Brussels as part of a national strike over government reforms and spending cuts that has brought flights to a halt and severely disrupted public transport. Belgium's three big unions are protesting over pensions and other measures by Prime Minister Bart de Wever's centre-right government aimed at cutting the budget deficit. There were no services at Belgium's second biggest airport at Charleroi, and all departures and many of the arrivals