Alec Baldwin's quick return to work might have moviegoers questioning his "sincerity" after the "Rust" shooting left him saying he might never act again, according to an industry expert. Baldwin, 63, was spotted Tuesday on the set of "97 Minutes" in Hampshire, England.The upcoming film is the actor's first project since the "Rust" shooting that left cinematographer Halyna Hutchins dead and director Joel Souza wounded.