The first test on the agenda was therefore of the new Red Beard design. OR.1127 also specified a requirement for the device to have variable yields, which Aldermaston attempted to achieve through the addition of small amounts of thermonuclear material, a process known as "boosting". A tower was built at Maralinga for a boosted weapon test, in case sufficient lithium deuteride could not be produced in time for the Operation Mosaic G2 test. In the event, it was available, and G2 went ahead as scheduled. Various tests of the effects of nuclear weapons were considered, but only one thought to be worth the effort was a test of a ground burst. These were known to produce more fallout and less effect than air bursts, and had therefore been avoided by the Americans, but such a test might produce useful information that the UK might trade with them. A ground test was therefore included in the schedule. A fourth test was an operational test. While the physics package of Blue Danube had been tested, there had been no test of the device in its operational form, so one was included in the Operation Buffalo program.