In 2002, Houston built a runway for Boeing 747s using a concrete mix with 25% fly ash and 25% blast-furnace slag; test slabs reached 800 psi flexural strength in 90 days The Times of India 19:00 Sun, 04 Oct
Ex-Qatari Air Force One Sidelined For 'Cosmetic Upgrades,' But No Word On Missile Defenses Simple Flying 18:44 Sun, 04 Oct
Canada-bound Lufthansa flight declares mid-air emergency and diverts to Manchester The Mirror 13:31 Sun, 27 Sep Article paywall
Inflatable Emergency Slide Deploys Moments Before Trump Boards Ex-Qatari Air Force One Simple Flying 23:17 Wed, 09 Sep
Trump To Fly Overseas On Ex-Qatari Boeing 747-8 With Unconfirmed Security Upgrades Simple Flying 21:51 Sat, 05 Sep
