Complex sentence: He flew as camera man for reconnaissance in the South Pacific and painted bomber noses during World War II. He then worked for Curtis-Wright for a brief period, then went to study at The Art Institute of Pittsburgh and began to work in advertising.
Split into simpler sentences: He flew as camera man for reconnaissance in the South Pacific and painted bomber noses during WWII. After which he worked for Curtis-Wright for a brief period then went to study at The Art Institute of Pittsburgh and began to work in advertising.