ALPA has been pushing for this since 9-11.

Scanna is a leader in the security space. They have brought to market a variety of products in the x-ray
realm. They make a variety of scanners, x-rays, and devices both in place and portable. They have both
civilian and military application.
https://www.scanna-msc.com/ (Links to an external site.)
https://securitytoday.com/articles/2019/01/24/new-technologies-aim-to-enhance-airport-security-speed-uplines.aspx (Links to an external site.)
On the actual “aircraft” front as far as advancements go, I love the cockpit secondary barrier.
ALPA has been pushing for this since 9-11. At United, we have a few aircraft (B-757’s) that have them.
However, we have been unsuccessful in lobbying management to mandate them, nor in getting Congress to
require them.
Before the merger, The Continental unit of ALPA tried to get management to buy into the concept.
Unfortunately, the Flight Attendants didn’t like the appearance of it in first class, and management didn’t
think it was worth “scaring” the passengers as it would display “too strong” of a security presence.
Boeing has them as standard issue on their new B 787 and B 777. However, Continental paid 90K per airframe to have them removed. Continental was also resistant to allowing Captains to use a beverage cart in
front of the cockpit door as an additional “slowing” barrier to prevent intrusion into the flight deck. Captains
revolted and simply instructed flight attendants that this was how it was going to be done. Now, it is
mandatory at the new United, and is SOP across the industry. Having a secondary barrier would alleviate
this requirement. On aircraft with a secondary barrier, the beverage cart is optional.