A serious runway incursion at Boston Logan International Airport on June 21 has prompted investigations by the FAA and NTSB, highlighting the persistent risks of operations on intersecting runways. The incident involved a Delta Air Lines Airbus A319 (flight DL2351) on final approach and an American Airlines Boeing 737-800 (flight AA3161) beginning its takeoff roll on a crossing runway. According to Flightradar24 data, the two aircraft came within approximately 300 feet (90 meters) of each other—a dangerously close margin that forced the Delta crew to execute an emergency go-around. **The Go-Around: A Standard but Critical Procedure** The Delta crew's decision to perform a go-around—aborting the landing and climbing away—was textbook. This maneuver is a cornerstone of aviation safety, taught extensively in ATPL training and practiced in simulators. For ATC students, it represents a key outcome of effective traffic separation and communication. In this case, the go-around prevented what could have been a catastrophic collision. The aircraft later landed safely, and passengers deplaned normally. However, the incident raises questions about the chain of events that led to the conflict. **ATC Communication Under Scrutiny** Preliminary reports suggest a possible misunderstanding in ATC instructions. Audio recordings from ATC.com indicate that a controller asked the American Airlines flight for its destination, while the pilot responded that they had already received takeoff clearance. The FAA and NTSB will analyze radio exchanges and clearance procedures to determine responsibility. Boston Logan's complex layout, with multiple intersecting runways, amplifies the need for precise coordination between pilots and controllers—a lesson directly relevant to ATPL and ATC students studying airport operations and phraseology. **Implications for Aviation Training** This near-miss serves as a real-world case study for students. ATPL candidates should understand the factors that can lead to runway incursions: ambiguous clearances, high workload, and airport geometry. ATC trainees must master the art of issuing unambiguous instructions, especially at busy airports. The incident also reinforces the importance of the sterile cockpit rule and crew resource management (CRM) during critical phases of flight. For both groups, the Boston Logan event is a stark reminder that safety margins can shrink rapidly without flawless communication and adherence to procedures.