July 28 1976:

At 3:42 a.m., an earthquake measuring between 7.8 and 8.2 magnitude on the Richter scale flattens Tangshan,
a Chinese industrial city with a population of about one million people.
As almost everyone was asleep in their beds, instead of outside in the relative safety of the streets,
the quake was especially costly in terms of human life.
An estimated 242,000 people in Tangshan and surrounding areas were killed, making the earthquake one of the deadliest in recorded history,
surpassed only by the 300,000 who died in the Calcutta earthquake in 1737,
and the 830,000 thought to have perished in China's Shaanxi province in 1556.

July 29, 1958 : NASA created

On this day in 1958, the U.S. Congress passes legislation establishing
the National Aeronautics and Space Administration (NASA), a civilian
agency responsible for coordinating America's activities in space.
NASA has since sponsored space expeditions, both human and mechanical,
that have yielded vital information about the solar system and
universe. It has also launched numerous earth-orbiting satellites that
have been instrumental in everything from weather forecasting to
navigation to global communications.
NASA was created in response to the Soviet Union's October 4, 1957
launch of its first satellite, Sputnik I. The 183-pound,
basketball-sized satellite orbited the earth in 98 minutes. The
Sputnik launch caught Americans by surprise and sparked fears that the
Soviets might also be capable of sending missiles with nuclear weapons
from Europe to America. The United States prided itself on being at
the forefront of technology, and, embarrassed, immediately began
developing a response, signaling the start of the U.S.-Soviet space
race.
On November 3, 1957, the Soviets launched Sputnik II, which carried a
dog named Laika. In December, America attempted to launch a satellite
of its own, called Vanguard, but it exploded shortly after takeoff. On
January 31, 1958, things went better with Explorer I, the first U.S.
satellite to successfully orbit the earth. In July of that year,
Congress passed legislation officially establishing NASA from the
National Advisory Committee for Aeronautics and other government
agencies, and confirming the country's commitment to winning the space
race.
In May 1961, President John F. Kennedy declared that America should
put a man on the moon by the end of the decade. On July 20, 1969,
NASA's Apollo 11 mission achieved that goal and made history when
astronaut Neil Armstrong became the first person to set foot on the
moon, saying "That's one small step for man, one giant leap for
mankind."
NASA has continued to make great advances in space exploration since
the first moonwalk, including playing a major part in the construction
of the International Space Station. The agency has also suffered
tragic setbacks, however, such as the disasters that killed the crews
of the Challenger space shuttle in 1986 and the Columbia space shuttle
in 2003. In 2004, President George Bush challenged NASA to return to
the moon by 2020 and establish "an extended human presence" there that
could serve as a launching point for "human missions to Mars and to
worlds beyond."

July 29 1958:

President Dwight D. Eisenhower signs an act that creates the National Aeronautics and Space Administration (NASA).
He called the signing “an historic step, further equipping the United States for leadership in the space age.”

July 30 1863:

The Shoshone chief Pocatello signs the Treaty of Box Elder,
bringing peace to the emigrant trails of southern Idaho and northern Utah.

Pocatello was a Bannock Shoshone, one of the two major Shoshone tribes that dominated modern-day southern Idaho.
Once a large and very powerful people, the Shoshone lost thousands to a smallpox epidemic in 1781.
The fierce Blackfoot Indians took further advantage of the badly weakened Shoshone to push them off the plains and into the mountains.
The first representatives of a people who would soon prove even more dangerous than the Blackfoot arrived in August 1805:
The expedition of Meriwether Lewis and William Clark.

On July 30:

1975 - Former Teamsters union president Jimmy Hoffa disappeared in suburban Detroit. Although presumed dead, his remains have never been found.

Hoffa disappeared at 2:30 pm on July 30, 1975, from the parking lot of the Machus Red Fox Restaurant in Bloomfield Hills, Michigan, a suburb of Detroit. He had been due to meet two Mafia leaders, Anthony "Tony Jack" Giacalone from Detroit and Anthony "Tony Pro" Provenzano from Union City, New Jersey and New York City.

His fate is a mystery that continues to this day. Among the theories are:

* Hoffa's assassination was allegedly ordered at Brutico's, an Italian restaurant in Old Forge, PA.

* Former Mafioso Bill Bonanno claimed in his book, Bound by Honor, that Hoffa was shot and put in the trunk of a car that was then run through a car compactor.

* Convicted mob hitman Donald Frankos, alias "Tony the Greek," has claimed that, while on furlough from prison (where he was incarcerated for a previous murder), he committed numerous hits, including that of Hoffa. Frankos claims that Hoffa was murdered in a house belonging to Detroit mobster Anthony Giacalone by a team consisting of Frankos and Westies gangster Jimmy Coonan, and that the body was subsequently buried in the foundations of Giants Stadium by another hitman, Joe "Mad Dog" Sullivan.

* Mob hitman Richard Kuklinski also claimed in one of his televised interviews that Hoffa was now a "car bumper". He claims that Hoffa was stabbed in the back of the head and placed in a steel barrel. The barrel was buried, but dug up due to the possibility of its discovery by police. According to Kuklinski, the barrel — with Hoffa's body still in it — was compacted and melted down, to become part of a shipment of recycled steel sold to a Japanese car manufacturer.

* Hoffa's body was buried in concrete in or near the Straits of Mackinac bridge.

* Hoffa's body was buried in what is now Giants Stadium in the Meadowlands, New Jersey. Several sites in the stadium were tested for an episode of Mythbusters. All proved to have no body.

* Hoffa's body was buried in a residential area in Hamilton, New Jersey.

* Hoffa's body was shipped across the border and resides at the Mondo Condo in Toronto, Canada.

None of these theories has been proven and his body has never been found. Hoffa was declared legally dead and a death certificate issued on 30 July, 1982, seven years after his disappearance. Rumors of sightings have persisted for years. His disappearance has since entered the public lexicon, where people would often state someone would "sooner find Jimmy Hoffa" than something else that was difficult to locate.