It's decision day in New Hampshire, as polling booths open across the US state in the country's first primary election for the Republican presidential candidate.<br /><br />Voters in the quaintly named village of Dixville Notch opened voting at just after midnight on Tuesday.<br /><br />The process of choosing a challenger to Barack Obama, the US president, is a complicated one, involving two types of polls in every US state, before the Republican national convention later in the year.<br /><br />Al Jazeera's Scott Heidler reports from New Hampshire.
