US may rely on aging U-2 spy planes longer than expected
http://www.businessmirror.com.ph/home/global-eye/22797-us-may-rely-on-aging-u-2-spy-planes-longer-than-expected
U-2 spyplanes in service; the earliest the U-2 would be retired is 2023.
The improved U-2S Dragon Lady, Block 20, aircraft taxis to the runway at Osan Air Base, South Korea.