Complex sentence: He had been collecting and restoring warbirds since the mid- 1990s, starting with the Curtiss P-40E Kittyhawk, so the creation of the museum, in order to share them with the public, was the logical next step.
Split into simpler sentences: He had been collecting and restoring warbirds since the mid- 1990s, starting with the Curtiss P-40E Kittyhawk. The creation of the Museum, in order to share them with the public, was the logical next step.