This is just to toss in a bit of historical perspective in case it’s of any interest. An escort, in very generic terms, is a secondary unit that accompanies a primary unit on a mission but which serves a different function than the primary unit. This different function is usually some kind of protective or support role. In terms of strategic bomber missions, the protective-escort role was generally carried out by fighters (preferably long-range ones). American WWII bomber doctrine did see bombers as protecting each other, in the sense that bombers like the B-17 were heavily armed and flew in formations designed to allow them to cover each other…but they weren’t regarded as “escorts” because each bomber still had the primary mission of bombing enemy targets. The British and American bomber commands in WWII did, however, stage decoy missions using multiple independent bomber formations. Typically, several formations (often widely separated) would be sent into the air, on courses which didn’t clearly indicate what specific target they were heading towards (they would eventually change course to head for their actual targets), with the Allies hoping that the Germans would send up their fighters to intercept the decoy force (which in some cases would turn back once it had drawn out the defencers) and thus end up out of position to attack the actual striking force. If the Germans guessed which force was real and which was fake, however, then the trick didn’t work. But at any rate, the only case I can recall of strategic bombers serving as pure escorts to other strategic bombers were the two A-bomb missions over Japan. In each case, one plane carried the bomb while the others carried observers and recording instruments.