What is associated with: cpl william eddy took the first aerial wartime surveillance photos from a kite during this 1898 conflict?

What is associated with: cp 1919 the first of these ever found emits bursts of radiation every 1337 seconds? Based on the clue 'cp short for this is a military units headquarters', what is the answer? Based on the clue 'cpb is the symbol for this maker of alphabet soup', what is the answer? Based on the clue 'cpj the committee to protect these people presents...', what is the answer? What is referred to by 'cr v passport'? Which performer is associated with 'cr'? Based on the clue 'crab cucumber rice this fatty fruit are all wrapp...', what is the answer? Based on the clue 'crabs cockroaches belong to this phylum from the ...', what is the answer?