EVB2923857: British Prime Minister Harold Macmillan meets with President John Kennedy in Washington. Macmillan was speaking with a group of descendants of Union Civil War Veterans who received the Congressional Medal of Honor. April 28, 1962 / Bridgeman Images

EVB2923873: 1963 Test Ban Treaty. President John Kennedy signs the document ratifying the nuclear test ban treaty today. / Bridgeman Images

EVB2923886: President John Kennedy opens the Baseball Season. He makes the ceremonial first pitch as Sen. Hubert Humphrey (left) and Mike Mansfield watch from behind. April 4, 1963 / Bridgeman Images

EVB2923888: President John Kennedy Boston leaves Children's Medical Center after the death of his infant son. August 9, 1963 / Bridgeman Images

EVB2923890: President John Kennedy urges 'self censorship' of news. Days after the failed Bay of Pigs invasion of Cuba, he spoke to the American Newspaper and Publishers Association. He disclosed that costly revisions were required in satellite tracking systems because of technical information published by US newspapers. April 27, 1961 / Bridgeman Images

GRL5613855: Classic Motorbike BMW R42 (photo) / Bridgeman Images

GRL5613862: Classic Motorbike Benelli 250 Corsa 4 Cilindri (250 Race 4 Cylinders with Compressor) (photo) / Bridgeman Images

GRL5613866: Classic Motorbike Benelli 250 Corsa 4 Cilindri (250 Race 4 Cylinders with Compressor) (photo) / Bridgeman Images

GRL5613871: Classic Motorbike Benelli 175 Bialbero Corsa (photo) / Bridgeman Images

GRL5613878: Classic Motorbike Ducati 125 Bialbero Gran Premio (photo) / Bridgeman Images

GRL5613881: Classic Motorbike Ducati 125 Bialbero Gran Premio (photo) / Bridgeman Images

GRL5613893: Classic Motorbike Motom 98 TS (photo) / Bridgeman Images

GRL5613898: Classic Motorbike Motom 98 TS (photo) / Bridgeman Images

GRL5613899: Classic Motorbike Benelli 125 (photo) / Bridgeman Images

GRL5613900: Classic Motorbike Benelli 125 (photo) / Bridgeman Images

GRL5613904: Classic Motorbike Motosacoche M5 (photo) / Bridgeman Images

GRL5613914: Classic Motorbike Reynolds Runabout, Scooter (photo) / Bridgeman Images

GRL5613915: Classic Motorbike Autoped, Scooter (photo) / Bridgeman Images

GRL5613918: Classic Motorbike Autoped, Scooter (photo) / Bridgeman Images

GRL5613923: Classic Motorbike Kingsbury Scooter (photo) / Bridgeman Images

GRL5613943: Classic Motorbike Ape Calessino, Scooter (photo) / Bridgeman Images

GRL5613962: Classic Motorbike Clement, deux cylindres 3 Hp (photo) / Bridgeman Images

GRL5613963: Classic Motorbike Clement, deux cylindres 3 Hp (photo) / Bridgeman Images

GRL5613965: Classic Motorbike Clement, deux cylindres 3 Hp, Engine (photo) / Bridgeman Images

GRL5613968: Classic Motorbike Garelli Cremona Corsa, Engine (photo) / Bridgeman Images

GRL5613973: Classic Motorbike Bianchi Freccia Azzurra 500 Corsa (photo) / Bridgeman Images

GRL5613984: Classic Motorbike Indian Powerplus 1000 Side (photo) / Bridgeman Images

GRL5613994: Classic Motorbike Motopiana Tipo Corsa 250, Engine (photo) / Bridgeman Images

GRL5613998: Classic Motorbike Perfecta Triciclo tipo Corsa, Trademark (photo) / Bridgeman Images

GRL5614017: Classic Motorbike Zedel - Frera 3 Hp (photo) / Bridgeman Images

GRL5614022: Classic Motorbike Griffon tipo Corsa. Wheel (photo) / Bridgeman Images

GRL5614026: Classic Motorbike Maserati 250 T4 (photo) / Bridgeman Images

GRL5614030: Classic Motorbike Maserati 250 T4, Trademark (photo) / Bridgeman Images

GRL5614031: Classic Motorbike Scott Super Squirrel (photo) / Bridgeman Images

GRL5614043: Classic Motorbike Mignon 125 N (photo) / Bridgeman Images

MOR5614338: A forest from the Carboniferous era / Bridgeman Images