Question

read the paragraph about the first successful combat helicopter rescue. select the sentence that should be removed to improve the focus of the paragraph.
the first successful combat rescue mission by helicopter occurred at the height of world war ii. a helicopter exhibition at the national air and space museum inspired me to learn more about this mission. on april 21, 1944, one american and three british soldiers crash - landed their plane behind enemy lines in southeast asia. although wounded, the men managed to escape into the jungle. they were soon located by an american war plane, and the u.s. military sent helicopter pilot carter harman to retrieve them. since the aircraft could only carry one passenger at a time, harman had to make four individual trips, all while hoping to avoid being spotted by enemy forces. despite a delay halfway through the rescue, caused by an overheated engine, harman eventually carried all four men to safety.

Explanation:

The paragraph's core focus is the first successful helicopter combat rescue mission in WWII. The sentence about the helicopter exhibition at the National Air and Space Museum is irrelevant to this core event, as it does not relate to the details of the 1944 rescue mission itself. Removing it tightens the focus on the rescue operation.

Answer:

"A helicopter exhibition at the National Air and Space Museum inspired me to learn more about this mission."