candidates strategies are now taking shape and nearly six years after the deadliest anti-semitic attack in us history, the tree of life synagogue in pittsburgh breaks ground on a new house of worship and a new future. i was there two witness this emotional moment and speak with families impacted by the horrific shooting. welcome to our viewers here in the united states and around the world i m wolf blitzer. a, you re in the situation room our top story this our president joe biden and former president donald trump are fine tuning their strategies for their potentially game-changing debate here on cnn this thursday, the two men sharing a sibling clear goal to portray their opponent as unfit for office are correspondence are covering both candidates as their epic showdown gets closer and closer. first, let s go to c and then gem j li ji reports on president biden s debate preparations everybody knows he s a liar, but you i just want i want to make sure what it lasting it lasts.