Rachel Carson says Russian leader cannot offer clear explanation . She says there could be ` ` ' '' from shooting down of jetliner over eastern Ukraine . Ukrainian government , pro - Russian rebels trade information over who is responsible .
Dianne Feinstein says Russian leader should offer clear explanation . She says there will be `` repercussions '' from shooting down of jetliner over eastern Ukraine . Ukrainian government , pro-Russian rebels trade accusations over who is responsible .