First I'll provide some history on this area of engineering. Aerospace engineering, also called aeronautical engineering, or astronautical engineering, is a field of engineering concerned with the design, development, construction, testing, and operation of vehicles operating in the Earth’s atmosphere or in outer space. In 1958 the first definition of aerospace engineering was formed, considering the Earth’s atmosphere and the space above it as a single realm for development of flight vehicles. The first piece of evidence of when aerospace started was back when the wrightbrothers first made their version of an engine run plane. Although it only flew for 12 seconds it was a sign of improvement that eventually helped the allies win WW1 by the creation of the single engine plane.
Although there is a decline in pilots for the most part, there is a increase in needed pilots for private jet companies. Along with being a private jet pilot you get many more benefits from this including better relationships with the passengers, less stress as there aren't as many people on board as normal, and better schedules. One thing that could be bad would the plane being hijacked, but the chance of it is low due to airport screening and security.
But not all of Aerospace just has pilots. There are architects and engineers that work on new plane designs every day. The U.S. has the most prominent Airforce and Navy in the world and with international competition growing the Airforce and Navy need more designs for planes and jets for half the price of modern jets.
Space is the next frontier, with mars being a big target by foreign competition. Luckily most of these space programs such as NASA have teamed up with CNSA (A.K.A. Chinese National Space Agency) to help build and design plans to colonize Mars. Right now Mars is like international water, but could soon be colonized.
Colonizing Mars might happen when we're alive, but rovers are already there and NASA knows that without the rovers and new people to design them, colonies on Mars would be impossible. Water on Mars has been found, but scientists want new very clean equipment to look at it, because the Curiosity rover isn't suited to test water. In turn new people bring their designs to NASA and if they approve it could add as many as 5,000 new jobs to make rockets and rovers. The Russian Space agency is improving their robotic and STEM capabilities by introducing more students to this field in their schools. Currently the U.S. and China are the only countries with rovers on Mars, but Russia is on their way.
Terrorism is the biggest world threat, because of al qaeda and isis. After 911 president G.W. Bush waged war against terrorism, which has almost wiped out al qaeda and isis. Ever since 911 terrorism has helped dropped the aerospace department, because of the vulnerability of aircrafts. Terrorism is so bad in parts of the Middle East that no fly zones have been placed above and around these areas like southern Syria. Planes are known to be attacked mid flight by guided missles and regular guns around the Middle East. This and foreign alliances have made no fly zones possible in these areas.
The devepmant of nuclear weapons has probably caused the most controversy, but is has succeeded in doing its job. The bomb was going to be made as a threat, but when Japan attacked Pearl Harbor we were forced to use it for our advance to end WW2. The development of nuclear weapons are down, because of anti-nuclear activists who say that we shouldn't use it, because it has many more negative environmental effects than positives benefits.