Russia: Trotsky arrives in Petrograd (from April 3 internment in Canada). Cabinet reshuffle admits 6 Petrograd Soviet Menshevik members.
USA: Aircraft Production Board set up.
Russia: Kerensky War Minister; he is visited at Petrograd by all the C-in-Cs.
Austria: CoS Arz (to Czernin) believes Russian Army collapse will obviate need for armistice talks.
Adriatic: Austrian U-5 mined and sunk off Pola but raised and reused.