corridors are expected to be open today, but some passages to establish humanitarian passages haven t worked. and now the focus turns to what vladimir putin may do now that the envision hasn t gone exactly as the kremlin planned. the white house has warned russia that they should not use chemical weapons in ukraine. cnn white house correspondent arette saenz asked the president about his concerns, here is his response. your white house has said that russia may use chemical weapons or create a false flag operation to use them, what evidence have you seen showing that? and what would the u.s. have a military response if putin has that attack? i m not going to speak about the intelligence but russia would pay a fear price if they use chemical weapons. president biden said the u.s. and others are stepping up the economic economic with trade status. we want to get an update on