The Fremont Street Experience in downtown Las Vegas is paying tribute to 1969 for 108 days this summer with free rock concerts plus a plethora of other reminders of that oh-so-groovy era. Blood, Sweat and Tears, Three Dog Night, the 5th Dimension, Rare Earth, the Grass Roots and Canned Heat are some of the players expected to show up between Memorial Day and Labor Day weekends. Videos depicting the era will also be displayed on wide-screens on Fremont Street. The 10 casinos located in down Las Vegas are hoping the plan will draw traffic to the area. It's estimate the group is spending $1.7 million on the campaign, which is designed to evoke an emotional reaction in visitors in their 50s and 60s. Each property will also pay homage to 1969 in its own way.