After deliberating over how best to rescue the boys and their coach - considering even whether to teach them how to dive, or wait for the monsoon waters to recede months later - rescue workers finally settled on pumping out as much water as possible, sedating those trapped and strapping them to a diver who shepherded them to safety.

Rescue divers initially found the 12 young soccer players and their coach alive on July 3 after they went missing in a Thai cave 10 days earlier. Fighting against time, rain and low oxygen levels, rescuers managed to free the first four boys successfully on July 8. The rescuers faced a complicated and dangerous diving mission to free the rest of the team and their coach.

Families of the teenage soccer players expressed their joy over the discovery of the boys nine days after they went missing. Outside the cave, the mother of one of the boys said she was "glad" for a glimpse of her son. "He's thinner," she said, as she ran her finger over the image of her son on a television screen.

Thai rescuers were assisted by an international team comprising experts from China, Australia, the USA and Britain. A video from the Thai Navy SEAL Facebook page showed the group several kilometers inside the 10-kilometer (6-mile) cave network on a small wedge of dry ground. The boys moved 400 meters further in as the ledge had become covered by water.

The boys, aged 11 to 16, and their 25-year-old coach entered the cave to celebrate one of the player's birthday. They became trapped in the cave, a local tourist spot where similar incidents have taken place in the past, when sudden rainfall flooded its entry on June 23. It was later reported that some of the boys could not swim, further complicating the rescue.

The rescue mission proved difficult for divers whose efforts were continually hampered by rising water that filled sections of the cave, often forcing them to stop. Getting trained divers into the cave was easier than getting untrained kids out.

The entire nation was glued to the media coverage of the rescue mission, and Thai authorities insisted they will not compromise on the safety of the trapped group. Prime Minister Prayuth Chan-ocha (above, at right) thanked international experts who helped find the boys.

The first four boys were rescued by a team of 13 foreign diving experts and Thai Navy SEALS, who helped them navigate the flooded cave tunnels. The head of the rescue operation said they were the healthiest in the group. The rest of the boys and their coach would be rescued from the cave over the next two days.

Doctors who treated the boys after their rescue reported that while they had lost weight, the otherwise appeared to be in good health. The dozens of divers and hundreds of other rescue workers have been celebrated around the world as heroes, especially 38-year-old former Thai Navy SEAL Saman Kunan, who died after bringing the group supplies of air on July 5.

Tech visionary Musk intends to revolutionize transportation, both on earth and in space, and the way humans lead their lives. Over the past two decades, the South African-born American entrepreneur has emerged as one of Silicon Valley's most recognized faces worldwide. Musk was cofounder of Paypal, which was acquired by eBay for $1.4 billion (€1.2 billion) in 2002.

In 2002, Musk founded SpaceX, an aerospace manufacturer and space transport services company currently valued at over $20 billion. He wants to make space travel cheaper and, eventually, enable human life on Mars, thus giving human kind a chance at becoming multi-planetary species.

SpaceX's Falcon and Dragon rocket programs both already deliver payloads into Earth's orbit. The company has said it wants to launch its Mars-bound cargo flight in 2022, followed by the first Mars flight with passengers in 2024.

After founding SpaceX, Musk set up Tesla in 2003 to come up with electric autonomous vehicles and renewable energy solutions. But production bottlenecks have plagued the company, with much of its future banked on the Model 3, its first mid-price, mass-market vehicle.

After the foray into electric cars, Musk last year opened a new chapter in his book of visions as he unveiled the prototype of a futuristic all-electric heavy truck. The vehicle — dubbed the Tesla Semi — is set to go into production in 2019. It would boast 500 miles of range, a battery and motors that will last 1 million miles and cheaper total operating costs than diesel models, Musk claimed.

Besides running SpaceX and Tesla, Musk has also invested in the solar energy company SolarCity to turn his vision of a solar-powered future into a reality. Musk said houses equipped with Tesla's Solar Roof would feed energy to Powerwall, a sleek storage unit designed to act as an electricity fill-up station for both the house and a Tesla electric car.

In 2015, Musk unveiled Powerwall, a home battery unit with a selling price of $3,500 for 10kWh and $3,000 for 7kWh. The Powerwall can be controlled via one's phone, from anywhere. But slow production rates have proved to be a problem.

Hyperloop came into global prominence after it was proposed by Musk in 2013. It is viewed as a next-generation transportation system — a "fifth mode" of transport (after planes, trains, cars and boats). It uses magnetically-levitated pods and sealed partial vacuum transit tubes to move people and freight at supersonic speeds estimated to reach over 700 miles per hour (1,127 kilometers per hour).

In 2016, Musk co-founded Neuralink, a neurotechnology startup that is reportedly trying to create brain-computer interfaces by integrating the human brain with artificial intelligence (AI). The project is currently at an early stage of development.