Skip to content

MARS Associates

For Retirees of LM, ULA, and Legacy Companies

  • Home
  • About
    • MARS Officers & Directors
    • Policy Documents
    • MARS Overview
  • Benefits
    • Dental Plans
    • Vision Plans
    • Hearing Aid Discounts
    • Pre-Medicare
    • Understanding Medicare
    • VIA Benefits
    • ULA Benefits Contacts
    • Local Discounts
    • LM Corporate Discounts
    • Tax Adjustments
    • Informational Sessions Presentations
    • What to do when your loved one dies
  • Events
    • Calendar
    • Full Year Calendar
    • Special Activities
      • Special Event Planning Steps
    • Event Photos
  • Membership
    • Membership Renewal
    • New Member Application
    • Member Contact
    • Volunteer
    • MARS Logo Store
  • Clubs
    • Bridge Club
    • MARS Car Club
    • Golf Club
    • Hiking Club
    • PACESETTERS Club
    • Photography Club
    • LM Clubs & Leagues
  • Communications
    • MARS STAR
      • Archive
    • In Memoriam
    • Website Team
  • History
    • On This Day
    • MARS Moments
    • Brief History of LM Denver
    • Martin Marietta Archives
  • Toggle search form

On this day – July 21

Posted on July 21, 2024June 27, 2024 By Barb Sande

The events on this day in history for our heritage companies are noted below.

The earliest event was in 1959, the latest event was in 2011

Two milestone events (5 to 65+ years ago)

Human Spaceflight:

1961 – LAUNCH: Mercury MR (Mercury Redstone) 4, LC5, CCAFS – Second manned Mercury flight (sub-orbital), Gus Grissom – Significant space event 

1962 – Advanced Saturn launch complex to be built on 80,000 acres northwest of CCAFS 

1966 – SPLASHDOWN: Gemini X  – Mid Atlantic, USS Guadalcanal 

2011 – LANDING: STS-135, KSC – Last shuttle mission

Military and Classified Programs:

1961- LAUNCH FAILURE: Lockheed Discoverer 27, Thor/Lockheed Agena B, SLC1W, VAFB

1962 – LAUNCH: Lockheed Corona 46 , Thor/Lockheed Agena B, SLC1W, VAFB

Exploration and Interplanetary Programs:

NONE

Earth-Monitoring and Civil Weather Satellite programs:

NONE

Commercial Programs:

NONE

Test, ICBM, FBM programs:

1959 – LAUNCH: GD Atlas C, LC12, CCAFS – MILESTONE: 65 years ago

1961 – LAUNCH: Martin Titan I, LC20, CCAFS

1962 – LAUNCH (2): Lockheed Polaris A2, SSBN611, ETR

2004 – LAUNCH: LM Peacekeeper, LF02, VAFB – MILESTONE: 20 years ago

Other:

NONE

The photos today are from two events.  First, the second American launched into space in 1961 on the Mercury-Redstone 4 mission.  Photos from that mission include the launch and a photo of astronaut Gus Grissom.  Photo Credits: NASA.

Second, the last shuttle flight landed on this day in 2011.  The photos include the landing and a special photo with the crews of STS-1 and STS-135.  Photo Credits: NASA.

July 21 – Launch of MR-4 with Gus Grissom. Photo Credit: NASA.
July 21 – Mercury Astronaut Gus Grissom (MR-4). Photo Credit: NASA.
July 21 – Landing of the last shuttle mission STS-135. Photo Credit: NASA.
Crews of STS-1 and STS-135 (see text for crew names). Photo Credit: NASA.
On This Day

Post navigation

Previous Post: On this day – July 20
Next Post: On this day – July 22

Related Posts

  • On this day – January 14 On This Day
  • On this day – August 11 On This Day
  • On this day – January 22 On This Day
  • On this day – March 1 On This Day
  • On this day – May 20 On This Day
  • On this day – November 10 On This Day

More Related Articles

On this day – May 10 On This Day
On this day – July 2 On This Day
On this day – February 15 On This Day
On this day – August 24 On This Day
On this day – March 16 On This Day
On this day – May 21 On This Day

About us

MARS Associates
PO Box 1128
Littleton, CO 80160-1128

Suggestion Box

Find us on Facebook

Copyright © 2025 MARS Associates