If you live in the San Francisco Bay Area, you have probably passed over the Oakland Bay Bridge many times in your life. The bridge is celebrating it’s 75th anniversary. Huffingon Post has some amazing photographs from the construction of the bridge: http://www.huffingtonpost.com/2011/11/11/bay-bridge-anniversary_n_1087376.html Construction of the bridge was started in 1933, at the height of…