canada currently has 5 cc150s. 001 is the one that is vip outfitted. it is hardly air force one, it simply contains a bedroom, shower and computer work stations. the cc150s were originally bought by wardair, when wardair went under, the mulrooney govt bought the cc150s to replaced the ageing 707s. the air force never really wanted another airliner, but did want a strat airlifter and an air to air re-fueller, and the airbuses were the only airframes they were getting so they got used to them. for about 5 years they were really a waste of space as they could not carry palletized cargo and were limited to the hold below for cargo. it would have been far cheaper for the air force to charter civvy aircraft to do those tasks. then in 1998 the govt paid for four of them to converted to combi standard and have cargo doors and strengthening installed. 001, which would have been to expensive to convert to combi, was up for sale for a while after chretien took office as he had a disdain for the "flying taj mahal". however, none of the offers came in at an acceptable amount so 001 was kept on strength to transport the govgen, queen, and personnel as chretien would never fly in it, instead choosing to purchase 2 brand new challengers at a price of $100 million to use as his personal aircraft. the money was never there for them to be converted to air to air re-fuellers until recently over 10 years from receiving them. the first one should be returning to canada soon allowing for the second one to be freed up to undergo its conversion to the a310 mrtt standard. once that this and the cf18 update is complete, the cf18s will once again be fully deployable to overseas commitments as the cc130 tankers just weren't able to operate as anything but tac re-fuelers. of course the military still needs true strat airlift capability as the cc150s cannot carry, basically, anything the army wants to take and the reliance of the usaf airlift fleet or drunk ukrainians is still pretty much the only way to get things there quick. as for the buying 20 a380s that would be about 14 too many, nevermind the fact that it was designed as a civvy airliner and not as a airlifter, such as the c17, which is the only real option.