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People walk past the main stage at the first day of Hempfest, Friday, Aug. 16, 2013, in Seattle. Thousands packed the Seattle waterfront park for the opening of a three-day marijuana festival — an event that is part party, part protest and part victory celebration after the legalization of pot in Washington and Colorado last fall. Hempfest was expected to draw as many as 85,000 people per day. (AP Photo/Elaine Thompson) ( Hempfest )

A tee shirt is displayed at the first day of Hempfest, Friday, Aug. 16, 2013, in Seattle. Thousands packed the Seattle waterfront park for the opening of a three-day marijuana festival — an event that is part party, part protest and part victory celebration after the legalization of pot in Washington and Colorado last fall. Hempfest was expected to draw as many as 85,000 people per day. (AP Photo/Elaine Thompson) ( Hempfest )

An American flag flies atop the stage at the first day of Hempfest, Friday, Aug. 16, 2013, in Seattle. Thousands packed the Seattle waterfront park for the opening of a three-day marijuana festival — an event that is part party, part protest and part victory celebration after the legalization of pot in Washington and Colorado last fall. Hempfest was expected to draw as many as 85,000 people per day. (AP Photo/Elaine Thompson) ( Hempfest )

A man wearing marijuana-themed sunglasses chats on a phone at the first day of Hempfest, Friday, Aug. 16, 2013, in Seattle. Thousands packed the Seattle waterfront park for the opening of a three-day marijuana festival — an event that is part party, part protest and part victory celebration after the legalization of pot in Washington and Colorado last fall. Hempfest was expected to draw as many as 85,000 people per day. (AP Photo/Elaine Thompson) ( Hempfest )

A man pulls out a bag of marijuana to fill a pipe at the first day of Hempfest, Friday, Aug. 16, 2013, in Seattle. Thousands packed the Seattle waterfront park for the opening of a three-day marijuana festival — an event that is part party, part protest and part victory celebration after the legalization of pot in Washington and Colorado last fall. Hempfest was expected to draw as many as 85,000 people per day. (AP Photo/Elaine Thompson) ( Hempfest )

Vendors look over their display of glass bongs at the first day of Hempfest, Friday, Aug. 16, 2013, in Seattle. Thousands packed the Seattle waterfront park for the opening of a three-day marijuana festival — an event that is part party, part protest and part victory celebration after the legalization of pot in Washington and Colorado last fall. Hempfest was expected to draw as many as 85,000 people per day. (AP Photo/Elaine Thompson) ( Hempfest )

Cody Park exhales a cloud of marijuana smoke after taking a hit on a bong at the first day of Hempfest, Friday, Aug. 16, 2013, in Seattle. Thousands packed the Seattle waterfront park for the opening of a three-day marijuana festival — an event that is part party, part protest and part victory celebration after the legalization of pot in Washington and Colorado last fall. Hempfest was expected to draw as many as 85,000 people per day. (AP Photo/Elaine Thompson) ( Hempfest )

A customer holds up a tee shirt for sale at the first day of Hempfest, Friday, Aug. 16, 2013, in Seattle. Thousands packed the Seattle waterfront park for the opening of a three-day marijuana festival ó an event that is part party, part protest and part victory celebration after the legalization of pot in Washington and Colorado last fall. Hempfest was expected to draw as many as 85,000 people per day. (AP Photo/Elaine Thompson) ( Hempfest )

A group of teenaged boys look over a display of glass pipes at the first day of Hempfest, Friday, Aug. 16, 2013, in Seattle. Thousands packed the Seattle waterfront park for the opening of a three-day marijuana festival ó an event that is part party, part protest and part victory celebration after the legalization of pot in Washington and Colorado last fall. Hempfest was expected to draw as many as 85,000 people per day. (AP Photo/Elaine Thompson) ( Hempfest )

A man wears an American flag as he walks past a vendor selling tie-dyed products at the first day of Hempfest, Friday, Aug. 16, 2013, in Seattle. Thousands packed the Seattle waterfront park for the opening of a three-day marijuana festival ó an event that is part party, part protest and part victory celebration after the legalization of pot in Washington and Colorado last fall. Hempfest was expected to draw as many as 85,000 people per day. (AP Photo/Elaine Thompson) ( Hempfest )

Billy Dee, of Newport, Wash., turns his head as he exhales a cloud of marijuana smoke at the first day of Hempfest, Friday, Aug. 16, 2013, in Seattle. Thousands packed the Seattle waterfront park for the opening of a three-day marijuana festival ó an event that is part party, part protest and part victory celebration after the legalization of pot in Washington and Colorado last fall. Hempfest was expected to draw as many as 85,000 people per day. (AP Photo/Elaine Thompson) ( Hempfest )