A series of explosions in 2014 that cost the Czech Republic millions of dollars in reparations was first thought to be an accident.But almost seven years later, the country’s top intelligence officers alleged Russian sabotage and expelled 18 embassy employees believed to be involved in a massive operation.Russia called out the allegations as absurd and retaliated by firing 90% of their Czech embassy staff, adding more fuel to the tensions between Russia and the rest of Europe…