Justices ruled park displays are free speech . Religious group group wanted to erect monument in city park . Group wanted its ' Seven Sisters ' to be Ten ##th monument . City said no ; group protested discrimination , violation of free speech .
Justices ruled park displays are government speech . Religious group Summum wanted to erect monument in city park . Group wanted its 'Seven Aphorisms ' to join Ten Commandments monument . City said no ; group alleged discrimination , violation of free speech .