På denne dagen i 1959......

....ble Scott Crossfield sluppet for første gang av en B-52 i glideflukt; den første flygingen med X-15.
Her er listen over de 8 første flygingene med maskinen:

List of X-15 Free flights

Flight	ID(1.)	Aircraft	Date	Pilot	Mach	Altitude (m)	Speed (km/h)
1	1-1-5	56-6670	June 8, 1959	Scott Crossfield	0.79	11,445	840
2	2-1-3	56-6671	September 17, 1959	Scott Crossfield	2.11	15,954	2,242
3	2-2-6	56-6671	October 17, 1959	Scott Crossfield	2.15	18,831	2,284
4	2-3-9	56-6671	November 5, 1959	Scott Crossfield	1.00	13,857	1,062
5	1-2-7	56-6670	January 23, 1960	Scott Crossfield	2.53	20,374	2,686
6	2-4-11	56-6671	February 11, 1960	Scott Crossfield	2.22	26,858	2,359
7	2-5-12	56-6671	February 17, 1960	Scott Crossfield	1.57	16,045	1,667
8	2-6-13	56-6671	March 17, 1960	Scott Crossfield	2.15	16,045	2,284

Foto: Per Gram