https://www.reuters.com/article/us-alphabet-loon/alphabet-shutting-down-loon-which-used-balloon-alternative-to-cell-towers-idUSKBN29R02U >Google parent Alphabet Inc is shutting down its internet balloon business Loon, which aimed to provide a less expensive alternative to cell towers, saying on Thursday that "the road to commercial viability has proven much longer and riskier than hoped."