Several Occupy DC protesters were arrested in Washington after confrontations with police in a park just blocks form the White House.<br/> Demonstrators chanted "We are the 99 percent" as officers handcuffed them. The conflict in D.C. centers around this wooden structure --- which went up overnight without a permit.<br/> Police gave demonstrators an hour to take down what protesters are calling "a symbol of foreclosed homes."<br/> When they refused, police moved in.<br/> The arrests on Sunday ended weeks of relative calm for the anti-Wall Street demonstration in Washington.<br/> Deborah Gembara, Reuters