CREECH AIR FORCE BASE, NV -- The success of introducing the Block 5 MQ-9 Reaper at the same time as the MQ-1 Predator sunsets depends in part on how Block 5 performs in combat. "The Air Force is continuing to receive Block 5 MQ-9s and is in the process of transitioning combat lines as aircraft are received," service spokeswoman Erika Yepsen told Inside the Air Force June 27. "As of last week, one combat line is operating Block 5s." Block...