Assertion: projectile | /r/HasProperty | sam
Facets:
Source sentences:
text: Conceptually, the B-70 was an invulnerable aircraft due to its ability to operate above 21,000 meters (70,000 ft) at a speed of Mach 3+, but the invention of surface-to-air missiles (SAM) rendered this invulnerability obsolete before it was fielded.