Rivals on attack as Florida votes in Republican contest
Voters have been casting their ballots in Florida, as the state looks to choose a Republican presidential candidate to take on Barack Obama.
The swing state, which could prove pivotal in November's election, is the fourth and largest state so far to hold a nominating contest.
The two leading contenders, Mitt Romney and Newt Gingrich, have been battling it out and the attacks have become quite fierce, as the BBC's Mark Mardell reports.
31 Jan 2012