Legal experts say the former Army officer convicted in a 2009 mass shooting could face a narrow, rushed path to appeal a public execution by firing squad ... .
The Pentagon's decision to livestream the firing-squad execution of FortHood shooter Nidal Hasan could put the spotlight on whether social media companies will allow videos on their platforms ... .
Public executions have become exceedingly rare worldwide. Among countries known to conduct them in recent years are Iran and Taliban-run Afghanistan. No other country is known to televise or livestream a legal execution, experts said ... .