The sit-in Tuesday involved dozens protesting the Keystone XL pipeline. It would go through Montana, South Dakota, Nebraska, Kansas, Oklahoma and Texas to refineries in Houston and Port Arthur, Texas.
Hannah says they hope President Barack Obama will not bow to oil lobbyists.
A Police officer arrests American actress Daryl Hannah during a protest against the construction of the Keystone XL pipeline, outside the White House in Washington, DC, August 30, 2011. Hannah was among dozens of protestors arrested in a demonstration against the oil pipeline which, if constructed, would run from Alberta's oilsands in Canada to Texas.
Daryl Hannah was arrested Tuesday during a protest at the White House against a proposed oil pipeline expansion.
Hannah and other protestors contend Canda's oil sands harm the environment.