[Multiple Signs Indicate Upcoming U.S.-Iran Negotiations, Sources Say High Probability Before Friday] BlockBeats reports that on April 19, according to Al Jazeera, two Pakistani security sources stated that negotiations between the United States and Iran are highly likely to take place before Friday. The sources based their judgment on the following factors: two U.S. heavy transport aircraft (C-17 Globemaster) have landed at the Nur Khan Airbase in Rawalpindi. This base is located near Pakistan's capital, Islamabad. Additionally, roads leading from the airport to Islamabad's Red Zone have been temporarily closed, indicating heightened security measures. The Serena Hotel and Marriott Hotel in Islamabad are clearing out guests and not accepting new bookings before Friday. The Serena Hotel was the venue for the first round of U.S.-Iran negotiations on April 11. According to monitoring by PolyBeats, on the prediction market Polymarket, the probability of a "U.S.-Iran next round of diplomatic talks" occurring before April 22 (next Wednesday) is 52%, and the probability of it happening before April 30 is as high as 73%.