Polymerase chain reaction (PCR) and rapid (antigen) tests for COVID-19 both involve taking a swab. Results for a PCR test take longer, as it needs to go to a laboratory. It is more costly but tends to ...
A B-52H Stratofortress assigned to the 419th Flight Test Squadron is prepared to conduct a flight test of the hypersonic AGM-183A Air-launched Rapid Response Weapon at Edwards Air Force Base, Calif., ...
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