NASA astronaut Ronald Garan attached to the robotic arm Canadarm2 moves a failed ammonia pump module from a storage platform on the ISS to the cargo bay of the space shuttle Atlantis during a planned spacewalk July 12, 2011. (NASA via Getty Images)
The U.S. Army and South Korean military responded to North Korea's missile launch with a combined ballistic missile exercise on July 5, 2017, into South Korean waters. (Photo by South Korean Defense Ministry/Getty Images)
US and Japanese (R) Navy ships are pictured docked at a harbour during the inauguration of joint naval exercises with India in Chennai on July 10, 2017. (ARUN SANKAR/AFP/Getty Images)
A PLA Navy fleet including the aircraft carrier Liaoning, submarines, vessels and fighter jets take part in a review in the South China Sea on April 12, 2018. (VCG via Getty Images)