Did obama put his hand on the bible when he was sworn in as president

the us constitution is a living document, meaning that it can be changed over time as the country changes.

the treaty of brest-litovsk was a peace treaty signed on 3 march 1918 between the new bolshevik government of russia and the central powers (german empire, austria-hungary, bulgaria, and the ottoman empire), that ended russia's participation in world war i.

according to worldatlas.com, the u.s. has an 86% literacy rate.